Updated: 24th July 2026
Reviewed by: David Small BSc (Hons), MSc, MTOPRA (Founder and CEO)
Is My Product a Medical Device?
One of the first questions every innovator, manufacturer and start-up asks is, “Is my product a medical device?” The answer is important because it determines whether your product must comply with medical device legislation before it can be legally placed on the market.
Many products appear to improve health or wellbeing, but not all are regulated as medical devices. Likewise, some products that seem relatively simple—such as software, wearable technology or accessories—may fall within the scope of the regulations depending on how they are intended to be used.
In both the European Union and the United Kingdom, determining whether a product is a medical device depends primarily on the manufacturer’s intended purpose, the claims made about the product, and how it achieves its intended effect. These factors are assessed before considering classification, conformity assessment or CE and UKCA marking requirements.
Making the wrong determination can have significant consequences. If a product that should be regulated as a medical device is incorrectly marketed as a consumer or wellness product, manufacturers may face enforcement action, product withdrawal, delayed market access and costly redesign of technical documentation. Equally, assuming a product is a medical device when it is not can result in unnecessary regulatory costs and delays.
This guide explains how regulators determine whether a product falls within the scope of the EU Medical Device Regulation (EU) 2017/745 (MDR), the UK Medical Devices Regulations 2002, and, where applicable, the In Vitro Diagnostic Medical Devices Regulation (EU) 2017/746 (IVDR). You’ll learn the key principles used by Competent Authorities, understand how intended purpose and mode of action influence regulatory status, explore common borderline products, and discover the next steps if your product is determined to be a medical device.
Whether you’re developing a wearable health device, medical software, cosmetic product, wellness technology or an entirely new healthcare innovation, understanding your product’s regulatory status is the essential first step towards achieving compliance and bringing it to market successfully.
New to the EU MDR?
If you're trying to determine whether your product is a medical device, it's important to understand the wider regulatory framework that applies once your product falls within scope. Our EU MDR for Beginners Guide provides a comprehensive introduction to Regulation (EU) 2017/745, covering medical device classification, intended purpose, General Safety and Performance Requirements (GSPRs), Technical Documentation, Clinical Evaluation, Risk Management, UDI, EUDAMED and the CE marking process.
What Is a Medical Device?
Before deciding whether your product is regulated as a medical device, it is important to understand what the legislation actually defines as a medical device.
Under both the EU Medical Device Regulation (EU) 2017/745 (MDR) and the UK Medical Devices Regulations 2002, a medical device is generally any instrument, apparatus, appliance, software, implant, reagent, material or other article that is intended by the manufacturer to be used for one or more specific medical purposes.
These medical purposes include activities such as:
- Diagnosing disease or medical conditions.
- Preventing disease.
- Monitoring a patient’s health or physiological processes.
- Predicting the onset or progression of disease.
- Treating or alleviating disease or injury.
- Compensating for an injury or disability.
- Investigating, replacing or modifying the anatomy or a physiological process.
- Supporting or sustaining life.
- Controlling or supporting conception.
- Providing information through the examination of specimens derived from the human body (for IVDs).
However, simply being used in a healthcare setting or relating to health does not automatically make a product a medical device.
For example:
| Product | Medical Device? | Why? |
|---|---|---|
| Digital thermometer for measuring body temperature | ✔ Yes | Intended to monitor body temperature for medical purposes. |
| Fitness smartwatch counting daily steps | ✖ Usually No | Intended for general fitness and wellness rather than medical diagnosis or treatment. |
| Smartwatch that detects atrial fibrillation | ✔ Yes | Makes a medical claim relating to diagnosis or monitoring of a medical condition. |
| Moisturising cosmetic cream | ✖ No | Intended for cosmetic purposes rather than a medical purpose. |
| Wound dressing | ✔ Yes | Intended to protect and manage wounds through a physical mode of action. |
The most important point is that regulators assess what the manufacturer intends the product to do, rather than simply what the product looks like or where it is used.
This is why two products that appear almost identical can have completely different regulatory requirements depending on their intended purpose, claims and mechanism of action.
The Three Questions Regulators Ask
Although the legal definitions contained within the EU MDR and UK Medical Devices Regulations may appear complex, regulators generally begin by answering three fundamental questions when determining whether a product is a medical device.
Understanding these questions can help manufacturers assess their products at an early stage and avoid costly regulatory mistakes later in development.
1. What Is the Intended Purpose of the Product?
The intended purpose is the single most important factor when determining whether a product is a medical device.
Regulators will consider how the manufacturer describes the product across all documentation, including:
- Product labels.
- Instructions for Use (IFU).
- Packaging.
- Marketing materials.
- Websites and online advertising.
- User manuals.
- Sales brochures.
- Training materials.
If the manufacturer states that the product is intended to diagnose, prevent, monitor, predict, treat or alleviate disease or injury, there is a strong possibility that the product falls within the scope of the medical device regulations.
Importantly, regulators assess the manufacturer’s intended purpose—not how customers may choose to use the product.
2. Does the Product Make a Medical Claim?
Medical claims are another key factor in determining regulatory status.
A product that claims to diagnose, monitor or treat a medical condition is far more likely to be considered a medical device than a product making only general wellbeing or lifestyle claims.
For example:
| Claim | Likely Medical Device? |
|---|---|
| “Tracks your daily step count.” | ✖ Usually No |
| “Helps you maintain an active lifestyle.” | ✖ Usually No |
| “Detects atrial fibrillation.” | ✔ Yes |
| “Measures blood glucose levels.” | ✔ Yes |
| “Monitors blood pressure.” | ✔ Yes |
| “Assists clinicians in diagnosing diabetic retinopathy.” | ✔ Yes |
Even subtle changes in marketing language can alter a product’s regulatory status. Manufacturers should therefore ensure that all claims made about the product accurately reflect their intended regulatory pathway.
3. How Does the Product Achieve Its Intended Purpose?
Once regulators understand the intended purpose, they consider how the product achieves that purpose.
Medical devices generally achieve their principal intended action through physical, mechanical, structural, electrical or software-based means.
Products that achieve their principal intended effect through pharmacological, immunological or metabolic means are generally regulated as medicinal products rather than medical devices, although there are important exceptions for combination products and certain ancillary substances.
Examples include:
| Product | Primary Mode of Action | Likely Regulatory Status |
|---|---|---|
| Wound dressing | Physical barrier protecting the wound | Medical Device |
| Orthopaedic implant | Mechanical support | Medical Device |
| Diagnostic imaging software | Software analysis | Medical Device |
| Antibiotic tablet | Pharmacological action | Medicinal Product |
| Vaccine | Immunological action | Medicinal Product |
Understanding a product’s principal mode of action is particularly important for innovative technologies that combine software, digital health, artificial intelligence or multiple therapeutic mechanisms.
Why These Three Questions Matter
Manufacturers often focus on what their product looks like or how similar products are marketed by competitors. However, regulators are primarily concerned with:
- What the manufacturer intends the product to do.
- What medical claims are made about the product.
- How the product achieves its intended purpose.
Only after these questions have been answered can the appropriate regulatory pathway, product classification and conformity assessment requirements be determined.
By addressing these three questions early in product development, manufacturers can avoid unnecessary redesign, reduce regulatory uncertainty and develop a clearer strategy for achieving compliance under the applicable legislation.
Why Intended Purpose Is Everything
When determining whether a product is a medical device, nothing is more important than its intended purpose.
Many manufacturers believe the physical design of a product determines whether it is regulated as a medical device. In reality, regulators are far more interested in what the manufacturer says the product is intended to do.
The intended purpose is established by the manufacturer and is reflected throughout the product’s documentation, including its labelling, Instructions for Use (IFU), packaging, website, advertising, brochures, training materials and any other information supplied with the product.
If these materials indicate that the product is intended to diagnose, prevent, monitor, predict, treat or alleviate disease or injury, the product is likely to fall within the scope of the medical device regulations.
Conversely, if the intended purpose relates solely to general wellbeing, fitness, cosmetic appearance or lifestyle improvement, the product may fall outside the definition of a medical device, provided no medical claims are made.
The Same Product Can Have Different Regulatory Status
Two products that are physically identical can be regulated completely differently depending on the manufacturer’s intended purpose.
| Product | Intended Purpose | Medical Device? |
|---|---|---|
| Fitness smartwatch | Measures daily activity, calories and exercise performance. | ✖ Usually No |
| Smartwatch with ECG function | Detects atrial fibrillation and assists healthcare professionals in diagnosis. | ✔ Yes |
| LED facial mask | Improves skin appearance and cosmetic wellbeing. | ✖ Usually No |
| LED light therapy device | Treats acne vulgaris using light therapy. | ✔ Yes |
| Heating patch | Provides warmth and comfort during cold weather. | ✖ Usually No |
| Heating patch | Provides temporary relief of muscular pain or menstrual pain. | ✔ May be a Medical Device* |
| Mobile application | Records daily exercise and hydration. | ✖ Usually No |
| Mobile application | Analyses ECG data and alerts users to potential cardiac abnormalities. | ✔ Yes |
*The regulatory status of heating patches and similar products depends on their intended purpose, claims and primary mode of action, and should always be assessed on a case-by-case basis.
Where Do Regulators Look for Intended Purpose?
Regulators do not rely solely on a manufacturer’s intended use statement.
Instead, they review all available information associated with the product, including:
- Product name.
- Product description.
- Labelling.
- Instructions for Use (IFU).
- Packaging.
- Website content.
- Advertising and promotional materials.
- Sales brochures.
- Social media content.
- User training materials.
- Product demonstrations.
Any of these sources may influence how the product is interpreted by regulators.
For this reason, manufacturers should ensure that all communications consistently reflect the intended regulatory positioning of the product.
Why Medical Claims Matter
Medical claims can significantly change the regulatory status of a product.
For example, describing a wearable device as helping users “maintain a healthy lifestyle” is unlikely, by itself, to make it a medical device.
However, claiming that the same device “detects cardiac arrhythmias,” “diagnoses sleep apnoea” or “monitors blood glucose levels” introduces specific medical purposes that are likely to bring the product within the scope of the medical device regulations.
Similarly, a cosmetic cream marketed to “improve skin appearance” is generally regulated as a cosmetic product, whereas a cream claiming to “treat eczema” or “heal diabetic ulcers” would be subject to a different regulatory framework.
Manufacturers should therefore review all product claims carefully before launching a product, as even seemingly minor wording changes can have significant regulatory implications.
Think Like a Regulator
When assessing a new product, regulators are effectively asking:
- What does the manufacturer say this product is intended to do?
- Does that purpose involve a recognised medical objective?
- Are there medical claims in the product’s marketing or documentation?
- Is the claimed purpose supported by the product’s design and evidence?
- Does the product achieve its intended purpose through a medical device mode of action?
If the answers indicate that the product has a medical purpose and meets the legal definition of a medical device, it will generally be regulated accordingly.
Understanding the importance of intended purpose at the earliest stages of product development allows manufacturers to choose the correct regulatory pathway, generate the appropriate evidence and avoid costly changes later in the development process.
Understanding Mode of Action
Once regulators understand what a product is intended to do, they then consider how it achieves its intended purpose. This is known as the product’s primary mode of action and is one of the key factors in determining the correct regulatory framework.
In simple terms, the mode of action describes the principal mechanism by which the product achieves its intended effect.
For many products, identifying the mode of action is straightforward. For innovative technologies, combination products or digital health solutions, however, determining the primary mode of action can be far more complex.
How Medical Devices Achieve Their Intended Purpose
Medical devices generally achieve their principal intended action through physical or mechanical means, rather than through a chemical interaction with the body.
Common medical device modes of action include:
- Physical support or protection.
- Mechanical action.
- Structural replacement.
- Electrical stimulation.
- Thermal effects.
- Optical or laser technology.
- Software analysis and decision support.
- Barrier functions.
Examples include wound dressings that protect damaged tissue, orthopaedic implants that provide structural support, infusion pumps that deliver medicines, and medical software that analyses physiological data to assist healthcare professionals.
How Medicinal Products Differ
Medicinal products achieve their principal intended effect through one or more of the following mechanisms:
- Pharmacological action – interacting with receptors or biochemical pathways to produce a therapeutic effect.
- Immunological action – stimulating, modifying or suppressing the body’s immune response.
- Metabolic action – altering or participating in normal metabolic processes within the body.
If one of these mechanisms is responsible for the product’s principal intended action, the product will generally be regulated as a medicinal product rather than a medical device.
| Product | Primary Mode of Action | Likely Regulatory Status |
|---|---|---|
| Wound dressing | Physical barrier protecting the wound | ✔ Medical Device |
| Hip implant | Mechanical support and structural replacement | ✔ Medical Device |
| Blood glucose monitoring software | Software analyses physiological data | ✔ Medical Device |
| Surgical laser | Physical energy used to cut or coagulate tissue | ✔ Medical Device |
| Antibiotic tablets | Pharmacological action against bacteria | ✖ Medicinal Product |
| Influenza vaccine | Immunological stimulation | ✖ Medicinal Product |
| Insulin | Metabolic regulation of blood glucose | ✖ Medicinal Product |
Combination Products Can Be More Complex
Not every product fits neatly into a single category.
Some products combine a medical device with a medicinal substance. Examples include:
- Drug-eluting coronary stents.
- Antimicrobial wound dressings.
- Prefilled syringes.
- Certain orthopaedic implants incorporating medicinal substances.
In these cases, regulators assess which mechanism provides the product’s principal intended action. The regulatory pathway may depend on whether the medicinal substance has an ancillary role or whether it provides the primary therapeutic effect.
These products often require additional regulatory assessment and specialist expertise.
Software and Mode of Action
Software deserves particular attention because it does not act physically on the body in the traditional sense.
Medical device software generally achieves its intended purpose by processing, analysing or interpreting medical information to support diagnosis, monitoring or treatment decisions.
Examples include:
- ECG analysis software.
- AI-assisted diagnostic imaging.
- Clinical decision support software.
- Insulin dose calculation applications.
Conversely, software intended only for administrative tasks, appointment scheduling, fitness tracking or general wellbeing will not usually be considered a medical device unless it performs a recognised medical function.
Why Mode of Action Matters
Determining the correct mode of action is essential because it influences the entire regulatory pathway.
An incorrect assessment can result in:
- Applying the wrong legislation.
- Delays to product launch.
- Additional regulatory costs.
- Requests for further evidence from regulators.
- Enforcement action or market withdrawal.
For innovative products, particularly those incorporating artificial intelligence, software, combination technologies or novel healthcare solutions, assessing the primary mode of action should form an integral part of the regulatory strategy from the earliest stages of development.
By understanding both intended purpose and mode of action, manufacturers can make more informed decisions about whether their product is regulated as a medical device, a medicinal product or another type of regulated healthcare product.
Understanding Borderline Products
Not every healthcare-related product fits neatly into a single regulatory category. Many products share characteristics with both medical devices and other regulated products, making it difficult to determine which legislation applies. These are commonly referred to as borderline products.
Borderline products are not a separate regulatory category. Instead, they are products whose regulatory status requires careful assessment because it is not immediately clear whether they should be regulated as a medical device, a medicinal product, a cosmetic, a food supplement or another type of regulated product.
Determining the correct regulatory status requires a detailed assessment of the manufacturer’s intended purpose, the claims made about the product, its primary mode of action and the applicable legislation.
Common Examples of Borderline Products
Many innovative products fall into this category, particularly where new technologies or wellness claims are involved.
Examples include:
- Wearable health monitors.
- Artificial intelligence (AI) software.
- Mobile health applications.
- LED light therapy devices.
- Heating and cooling patches.
- Cosmetic products with therapeutic claims.
- Food supplements making disease-related claims.
- Red light therapy devices.
- Fertility monitoring products.
- Smart diagnostic devices.
These products should never be classified solely by comparing them with similar products already on the market. Each product must be assessed individually.
Borderline Product Examples
| Product | Likely Regulatory Status* | Why? |
|---|---|---|
| Fitness tracker | Usually not a medical device | Intended for general wellbeing and activity monitoring. |
| ECG analysis smartwatch | Medical device | Intended to detect or monitor a medical condition. |
| Cosmetic moisturiser | Cosmetic product | Intended to improve appearance only. |
| Cream claiming to treat eczema | May be a medicinal product or medical device | Depends on the claims and primary mode of action. |
| LED beauty mask | Cosmetic product | Intended for cosmetic purposes. |
| LED acne treatment device | Medical device | Intended to treat a recognised medical condition. |
| Vitamin supplement | Food supplement | Intended to support general nutrition. |
| AI software analysing CT scans | Medical device | Supports diagnosis or clinical decision-making. |
*The final regulatory status always depends on a detailed assessment of the individual product.
Why Borderline Assessments Can Be Difficult
Modern healthcare products increasingly combine multiple technologies, making regulatory determinations more challenging than ever.
For example, a wearable device may include:
- Sensors that collect physiological data.
- Artificial intelligence algorithms.
- Mobile applications.
- Cloud-based analytics.
- Clinical decision support functions.
Each component may contribute differently to the product’s intended purpose and overall regulatory status.
Similarly, cosmetic products may incorporate ingredients or technologies that appear therapeutic, while software originally designed for fitness monitoring may gradually evolve into software intended to diagnose or monitor disease.
For these reasons, regulators assess the product as a whole rather than focusing on a single feature.
Don't Rely on Your Competitor's Classification
One of the most common mistakes manufacturers make is assuming that because a competitor markets a similar product without CE marking or UKCA marking, their own product must also fall outside the medical device regulations.
This is a risky assumption.
Two products that appear almost identical may have completely different regulatory requirements because:
- The manufacturers have different intended purposes.
- Different medical claims are made.
- The Instructions for Use differ.
- The software functionality is different.
- The products achieve their intended purposes through different modes of action.
Regulators assess each product individually based on the evidence provided by its manufacturer.
When Should You Seek Regulatory Advice?
If there is any uncertainty about whether your product is a medical device, it is advisable to obtain regulatory advice before product development is finalised or marketing materials are published.
An early regulatory assessment can help you:
- Identify the correct regulatory framework.
- Develop an appropriate regulatory strategy.
- Avoid costly redesign or re-labelling.
- Generate the correct clinical and technical evidence.
- Reduce delays to market entry.
- Minimise the risk of enforcement action.
Determining whether a product is a medical device is often the foundation for every subsequent regulatory activity, including classification, Technical Documentation, Clinical Evaluation, conformity assessment and market access.
Annex XVI Products: Products Without a Medical Purpose That Are Still Regulated
One of the most significant changes introduced by the EU Medical Device Regulation (EU) 2017/745 (MDR) is that certain products without an intended medical purpose are still regulated in much the same way as medical devices.
These products are listed in Annex XVI of the MDR and are subject to many of the same regulatory requirements as conventional medical devices, including conformity assessment, technical documentation, risk management, clinical evaluation (where appropriate), post-market surveillance and CE marking.
The purpose of Annex XVI is to ensure that products presenting similar risks to medical devices are subject to an appropriate level of regulatory oversight, even where they are intended solely for aesthetic or cosmetic purposes.
What Types of Products Are Included?
Annex XVI currently includes six categories of products that have no intended medical purpose but are regulated under the MDR.
These include:
- Contact lenses and other products introduced into or onto the eye.
- Products intended to be totally or partially introduced into the human body to modify anatomy, such as dermal fillers.
- Equipment intended to reduce, remove or destroy adipose (fat) tissue, including liposuction devices.
- High-intensity electromagnetic equipment used for skin treatments, tattoo removal or hair removal.
- High-intensity infrared, visible light and ultraviolet emitting equipment intended for skin resurfacing or similar aesthetic procedures.
- Brain stimulation equipment that applies electrical, magnetic or electromagnetic currents to the brain.
Although these products are not intended to diagnose or treat disease, they may present risks comparable to medical devices and therefore require regulatory control.
Why Are Annex XVI Products Regulated?
Many aesthetic and cosmetic products interact directly with the human body and may present significant risks if they are poorly designed or inadequately controlled.
Potential risks include:
- Burns and tissue damage.
- Infection.
- Eye injuries.
- Allergic reactions.
- Nerve damage.
- Long-term complications following implantation.
- Electrical hazards.
For this reason, manufacturers must demonstrate that these products meet appropriate safety and performance requirements before they are placed on the European market.
Annex XVI Does Not Apply in Great Britain
It is important to understand that Annex XVI is a feature of the EU MDR.
The current UK Medical Devices Regulations do not automatically regulate Annex XVI products in the same way.
Manufacturers wishing to market these products in both the European Union and Great Britain should therefore assess the regulatory requirements for each jurisdiction separately, as different legislation may apply.
Common Misunderstandings
A common misconception is that products intended solely for cosmetic or aesthetic purposes can never be regulated as medical devices.
This is no longer true under the EU MDR.
While most cosmetic products continue to be regulated under cosmetic legislation, certain higher-risk aesthetic products listed in Annex XVI must comply with the MDR despite having no intended medical purpose.
Manufacturers should therefore avoid assuming that the absence of a medical claim automatically places a product outside the scope of medical device legislation.
Practical Takeaway
If your product is intended for aesthetic or cosmetic use, do not assume that medical device legislation does not apply.
Instead, consider:
- Does the product fall within one of the Annex XVI categories?
- Does it present risks similar to a medical device?
- Does it require conformity assessment before being placed on the EU market?
- Does different legislation apply in Great Britain?
Obtaining an early regulatory assessment can help manufacturers identify the correct legal framework and avoid costly delays during product development or market entry.
When Does Software Become a Medical Device?
As digital health technologies continue to evolve, one of the most common regulatory questions is whether software or a mobile application qualifies as a medical device.
The answer depends on exactly the same principles discussed throughout this guide: intended purpose, medical claims and mode of action.
Software is not regulated as a medical device simply because it is used in a healthcare environment. Instead, regulators assess whether the software is intended to perform a medical purpose, such as diagnosing, monitoring, predicting or treating disease, or supporting clinical decision-making.
Software That Is Usually Not a Medical Device
Many software applications support general wellbeing, administration or healthcare logistics without performing a medical function.
Examples include:
- Appointment scheduling systems.
- Electronic invoicing software.
- Stock management systems.
- General fitness tracking applications.
- Diet and nutrition logging apps.
- Wellness and mindfulness applications.
- Medical reference libraries without patient-specific analysis.
Although these applications may be used within healthcare settings, they generally do not meet the legal definition of a medical device because they do not perform a recognised medical purpose.
Software That Is Likely to Be a Medical Device
Software is much more likely to be regulated as a medical device when it performs functions such as:
- Analysing patient data.
- Supporting diagnosis.
- Monitoring physiological parameters.
- Predicting disease progression.
- Recommending treatment options.
- Calculating medication dosages.
- Assisting clinicians in making healthcare decisions.
- Using artificial intelligence to interpret medical images or physiological signals.
These functions directly support patient care and therefore fall within the scope of the medical device regulations.
Examples
| Software Application | Likely Medical Device? | Why? |
|---|---|---|
| Step counter app | ✖ Usually No | Intended for general fitness and wellbeing. |
| Calorie tracking app | ✖ Usually No | Supports lifestyle management rather than medical care. |
| ECG interpretation app | ✔ Yes | Analyses physiological data for medical purposes. |
| AI software detecting lung nodules on CT scans | ✔ Yes | Supports diagnosis by analysing medical images. |
| Blood glucose dose calculator | ✔ Yes | Assists with therapeutic decision-making. |
| Hospital appointment booking system | ✖ No | Performs administrative functions only. |
Artificial Intelligence Does Not Automatically Make Software a Medical Device
Artificial intelligence is becoming increasingly common in healthcare, but the use of AI alone does not determine whether software is regulated as a medical device.
For example:
- An AI system that recommends music based on a user’s mood is not a medical device.
- An AI system that detects diabetic retinopathy from retinal images is likely to be a medical device.
- An AI application that predicts the risk of stroke using patient-specific clinical data may also be regulated as a medical device.
The determining factor is the software’s intended medical purpose, not the technology used to achieve it.
Medical Device Software Requires Additional Regulatory Considerations
Once software is determined to be a medical device, manufacturers must comply with the applicable regulatory requirements, which may include:
- Medical device classification.
- Technical Documentation.
- Clinical Evaluation or Performance Evaluation.
- Software lifecycle processes.
- Risk Management in accordance with ISO 14971.
- Usability Engineering.
- Cybersecurity considerations.
- Post-market surveillance and vigilance activities.
Manufacturers should also consider compliance with IEC 62304, the internationally recognised standard for the medical device software lifecycle, which is widely expected by regulators and Notified Bodies.
Why Early Software Classification Matters
Software development often progresses rapidly, with new features added throughout the product lifecycle.
If the regulatory status of the software is not considered early in development, manufacturers may later discover that significant changes are required to documentation, software architecture, testing or clinical evidence.
By determining whether software qualifies as a medical device from the outset, organisations can incorporate regulatory requirements into the development process, reducing delays and supporting a smoother route to market.
Developing Medical Device Software?
If your software is determined to be a medical device, complying with IEC 62304 is a key part of demonstrating a robust software development lifecycle. Learn how the standard supports software planning, risk management, design, verification, validation and maintenance by reading our IEC 62304 Explained Guide.
Can Accessories Also Be Medical Devices?
A common misconception is that only the primary product is regulated as a medical device. In reality, accessories intended specifically to enable or support the use of a medical device may themselves be regulated under the medical device legislation, even if they do not have a direct medical purpose on their own.
Under the EU Medical Device Regulation (EU) 2017/745 (MDR), an accessory to a medical device is an article which, while not itself being a medical device, is intended by its manufacturer to enable a medical device to be used in accordance with its intended purpose or to specifically and directly assist its medical functionality.
This means an accessory may be subject to many of the same regulatory requirements as the medical device it supports, including classification, Technical Documentation, conformity assessment and CE marking.
What Is an Accessory?
Accessories are designed to work with a specific medical device or family of medical devices.
They may:
- Enable the device to function correctly.
- Improve the device’s performance.
- Support monitoring or diagnosis.
- Facilitate safe operation.
- Extend the functionality of the primary device.
Although an accessory may not directly diagnose or treat a patient, its intended purpose is closely linked to the safe and effective use of the medical device.
Examples of Medical Device Accessories
| Product | Likely Accessory? | Why? |
|---|---|---|
| ECG electrodes | ✔ Yes | Enable ECG equipment to record physiological signals. |
| Patient monitoring sensors | ✔ Yes | Required for the medical device to perform its intended purpose. |
| Dedicated calibration equipment | ✔ Yes | Specifically intended to maintain the performance of a medical device. |
| Software controlling an infusion pump | ✔ Yes | Directly supports the operation of the medical device. |
| Sterile single-use adapters | ✔ Yes | Enable safe use of the medical device. |
| Generic USB cable | ✖ Usually No | General-purpose product not specifically intended for a medical device. |
| Standard office computer | ✖ Usually No | General-purpose equipment without a specific medical intended purpose. |
Intended Purpose Still Determines the Outcome
As with medical devices themselves, the manufacturer’s intended purpose remains the deciding factor.
For example:
A power supply designed specifically for use with a particular medical device and described by the manufacturer as an essential component of that device may be regulated as a medical device accessory.
By contrast, a commercially available power cable intended for general consumer electronics would not normally be regulated simply because it is capable of being connected to a medical device.
The same principle applies to software, sensors, replacement components and communication equipment.
Why Correct Identification Matters
Incorrectly assuming that an accessory falls outside the medical device regulations can create significant compliance risks.
Manufacturers may find that they need to:
- Prepare Technical Documentation.
- Demonstrate compliance with applicable General Safety and Performance Requirements (GSPRs).
- Apply appropriate conformity assessment procedures.
- Maintain post-market surveillance activities.
- Affix CE marking where required.
Considering accessories early in product development helps ensure that all components within the product ecosystem are assessed correctly and included within the overall regulatory strategy.
Worked Example: Is This Product a Medical Device?
Determining whether a product is a medical device is rarely based on a single feature. Regulators consider the manufacturer’s intended purpose, the claims made about the product and its primary mode of action before deciding which regulatory framework applies.
The following example demonstrates how this assessment works in practice.
Scenario
A start-up has developed a wearable adhesive patch that gently warms the skin when activated.
Initially, the manufacturer plans to market the product as a general wellness product designed to provide comfort during cold weather.
Later, the marketing team proposes promoting the same product as providing temporary relief from menstrual pain and helping to relieve muscular aches and pains.
Although the physical product has not changed, its regulatory status may have.
Step 1 – Assess the Intended Purpose
The first question regulators ask is:
What is the manufacturer intending the product to do?
Version 1 – General Wellness
The manufacturer states that the patch:
- Provides warmth during cold weather.
- Improves user comfort.
- Supports general wellbeing.
These are general lifestyle and comfort claims rather than medical claims.
At this stage, the product may not fall within the definition of a medical device.
Version 2 – Pain Relief
The manufacturer now claims that the same patch:
- Provides temporary relief from menstrual pain.
- Helps relieve muscular pain.
- Supports pain management.
These claims introduce a recognised medical purpose.
The product may now fall within the scope of the medical device regulations, subject to a full regulatory assessment.
Step 2 – Consider the Mode of Action
The next question is:
How does the product achieve its intended purpose?
In this example, the patch delivers controlled heat to the skin.
The principal intended action is achieved through a physical thermal effect, rather than through pharmacological, immunological or metabolic means.
This mode of action is consistent with many regulated medical devices.
Step 3 – Consider the Overall Regulatory Status
After reviewing:
- The intended purpose.
- The medical claims.
- The primary mode of action.
…the manufacturer concludes that the product is likely to require assessment as a medical device.
The next steps would typically include:
- Determining the appropriate device classification.
- Preparing Technical Documentation.
- Performing Risk Management.
- Conducting any necessary Clinical Evaluation.
- Demonstrating compliance with the applicable General Safety and Performance Requirements (GSPRs).
- Completing the appropriate conformity assessment before placing the product on the market.
Key Lesson
This example demonstrates an important regulatory principle:
A small change in the manufacturer’s intended purpose or marketing claims can fundamentally change a product’s regulatory status.
The product itself did not change.
Its materials, design, technology and manufacturing process all remained the same.
The only difference was how the manufacturer intended the product to be used and the claims made about its performance.
This is why regulatory assessments should always be carried out before marketing materials, websites and product labelling are finalised.
By determining the correct regulatory status early in development, manufacturers can avoid unnecessary delays, reduce compliance risks and ensure they generate the evidence needed to support their chosen route to market.
Common Mistakes Manufacturers Make
Determining whether a product is a medical device is rarely straightforward, particularly for innovative products, software and technologies that sit close to the boundary between medical devices and other regulated products.
Over the years, we’ve seen many manufacturers make similar assumptions that ultimately lead to delays, additional costs or regulatory challenges. Understanding these common mistakes can help you avoid them and build the correct regulatory strategy from the outset.
Mistake 1 – Assuming Your Product Isn't a Medical Device Because It Looks Like a Consumer Product
Many products resemble everyday consumer goods but are regulated as medical devices because of their intended purpose.
For example, a smartwatch used solely for fitness tracking may not be a medical device, while an almost identical smartwatch that detects cardiac arrhythmias or monitors physiological parameters for clinical purposes is likely to fall within the medical device regulations.
The appearance of the product is far less important than the manufacturer’s intended purpose.
Mistake 2 – Believing That Small Changes to Marketing Claims Don't Matter
Marketing claims can fundamentally change a product’s regulatory status.
Statements such as:
- “Supports general wellbeing.”
- “Encourages a healthy lifestyle.”
are very different from claims such as:
- “Detects atrial fibrillation.”
- “Treats acne.”
- “Relieves chronic pain.”
- “Assists clinicians in diagnosis.”
Even if the product itself is unchanged, modifying the intended purpose or promotional claims may bring it within the scope of the medical device regulations.
Mistake 3 – Assuming Your Competitor's Regulatory Status Applies to Your Product
Many manufacturers compare their products with competitors and assume the same regulatory pathway applies.
This approach is risky.
Regulators assess each product individually, considering:
- Intended purpose.
- Medical claims.
- Mode of action.
- Software functionality.
- Supporting evidence.
- Product documentation.
Two products that appear almost identical may be regulated very differently.
Mistake 4 – Leaving Regulatory Assessment Until the Product Is Finished
Some manufacturers wait until product development is complete before considering whether the product is a medical device.
By this stage, they may discover they need:
- Additional design controls.
- Risk Management documentation.
- Clinical evidence.
- Technical Documentation.
- Software lifecycle documentation.
- Usability Engineering.
- Regulatory testing.
Addressing these requirements late in development often increases costs and delays market access.
Mistake 5 – Assuming Software Is Never a Medical Device
Software is one of the fastest-growing areas of medical device regulation.
While many applications remain outside the scope of the regulations, software intended to diagnose, monitor, predict or treat disease—or support clinical decision-making—is often regulated as a medical device.
The determining factor is not that the product is software, but what the software is intended to do.
Mistake 6 – Ignoring Accessories and Connected Products
Manufacturers sometimes assess only the primary product and overlook accessories, dedicated software, sensors or supporting equipment.
However, accessories specifically intended to enable or support the use of a medical device may themselves be regulated and require their own regulatory assessment.
Considering the complete product ecosystem helps ensure nothing is overlooked during the conformity assessment process.
Best Practice: Assess Regulatory Status Early
The most successful manufacturers begin their regulatory assessment at the earliest stages of product development.
Doing so allows them to:
- Select the correct regulatory pathway.
- Generate the appropriate evidence.
- Develop compliant Technical Documentation.
- Avoid unnecessary redesign.
- Reduce regulatory uncertainty.
- Reach the market more efficiently.
If there is any doubt about whether your product is a medical device, obtaining expert regulatory advice before finalising product claims, labelling or marketing materials can save considerable time, cost and effort later in the development process.
Conclusion
Determining whether your product is a medical device is one of the most important regulatory decisions you will make. It influences every stage of the product lifecycle, from design and development through to classification, Technical Documentation, conformity assessment, CE marking or UKCA compliance, and ongoing post-market surveillance.
Although the legal definitions contained within the EU Medical Device Regulation (EU) 2017/745 (MDR) and the UK Medical Devices Regulations can appear complex, the assessment ultimately comes down to a few key principles. Regulators will consider the manufacturer’s intended purpose, the claims made about the product, and the product’s primary mode of action to determine whether it falls within the scope of the legislation.
For many innovative products—including software, artificial intelligence, wearable technology, cosmetic devices and connected healthcare solutions—the answer is not always straightforward. Small changes to product claims, labelling or intended use can significantly alter the regulatory pathway and the evidence required to demonstrate compliance.
By assessing your product’s regulatory status early in development, you can reduce uncertainty, avoid costly redesigns, generate the appropriate technical and clinical evidence, and build a regulatory strategy that supports efficient market access in both the European Union and Great Britain.
If you’re unsure whether your product is a medical device, obtaining expert advice at an early stage can save significant time, cost and effort. Patient Guard’s regulatory specialists can help you determine whether your product falls within the scope of the medical device regulations, identify the correct classification, and support you through every stage of compliance, from regulatory strategy and Technical Documentation to CE marking, UKCA compliance and post-market obligations.
How Patient Guard Can Help
Patient Guard as a leading medical device consultancy specialises in advising developers and manufacturers on qualifying and classifying their medical devices. Contact us for more details.
Frequently Asked Questions
The first step is to assess your product’s intended purpose, the claims you make about it, and its primary mode of action. If the product is intended to diagnose, prevent, monitor, predict, treat or alleviate disease or injury, or has another recognised medical purpose, it is likely to fall within the scope of the medical device regulations. The product should then be assessed against the applicable legislation to determine the correct regulatory pathway.
Not always, but medical claims are one of the strongest indicators that a product may be regulated as a medical device. Claims relating to diagnosis, monitoring, treatment or prevention of disease should always trigger a formal regulatory assessment before the product is placed on the market.
Yes. Two products that are physically identical may be regulated differently if their manufacturers have different intended purposes or make different claims about their use. Regulators assess the manufacturer’s intended purpose rather than simply the product’s appearance or design.
Software can be a medical device if it performs a medical purpose, such as analysing patient data, supporting diagnosis, monitoring disease or assisting clinical decision-making. Administrative software, appointment booking systems and general wellness applications are not usually regulated as medical devices unless they perform a recognised medical function.
A borderline product is one whose regulatory status is not immediately clear because it shares characteristics with medical devices and other regulated products, such as cosmetics, medicinal products or food supplements. Determining the correct regulatory status requires an assessment of the intended purpose, medical claims, mode of action and applicable legislation.
Yes, they can be. Accessories that are specifically intended to enable or directly support the use of a medical device may themselves be regulated under the medical device legislation, even if they do not perform a medical purpose independently. Each accessory should be assessed based on its intended purpose.
Incorrectly determining your product’s regulatory status can lead to significant consequences, including delayed market access, enforcement action, product withdrawal, redesign of Technical Documentation and additional regulatory costs. Carrying out an early regulatory assessment helps reduce these risks.
No. A product must first be assessed to determine whether it meets the legal definition of a medical device. Only after this determination has been made can the manufacturer establish the applicable regulatory requirements, including whether CE marking or UKCA compliance is required before placing the product on the market.
Ideally, the assessment should be carried out during the earliest stages of product development. Establishing the correct regulatory status before finalising product claims, labelling and marketing materials helps ensure that the appropriate evidence, Technical Documentation and regulatory strategy are developed from the outset.
Yes. Patient Guard provides regulatory pathway assessments for manufacturers developing new and innovative healthcare products. Our consultants assess your product’s intended purpose, medical claims and mode of action to determine whether it falls within the scope of the EU Medical Device Regulation (EU MDR), the UK Medical Devices Regulations or the In Vitro Diagnostic Medical Devices Regulation (IVDR). We can also support device classification, Technical Documentation, Clinical Evaluation, Quality Management Systems, CE marking and UKCA compliance.
References
This guide is based on the following legislation and official regulatory guidance relating to determining whether a product falls within the definition of a medical device under European and international regulatory frameworks.
| Organisation | Reference | Why it's relevant |
|---|---|---|
| European Union | Regulation (EU) 2017/745 on Medical Devices (MDR) | Contains the legal definition of a medical device in Article 2 and establishes the regulatory framework used to determine whether a product falls within the scope of the MDR. |
| European Union | Regulation (EU) 2017/746 on In Vitro Diagnostic Medical Devices (IVDR) | Provides the legal definition of an in vitro diagnostic medical device and supports determination of whether products fall within the scope of the IVDR. |
| Medicines and Healthcare products Regulatory Agency (MHRA) | Borderline Products – How to Tell if Your Product is a Medical Device | Explains how the MHRA determines whether a product is a medical device, including the role of intended purpose, mode of action and borderline product assessment. |
| U.S. Food and Drug Administration (FDA) | How to Determine if Your Product is a Medical Device | Provides the FDA's official approach to determining whether a product meets the definition of a medical device and outlines the key factors considered during device determination. |
| European Commission | MDCG Endorsed Documents and Other Guidance | Provides access to official Medical Device Coordination Group (MDCG) guidance supporting interpretation of the MDR, including guidance relevant to borderline products, classification and regulatory qualification. |
Determining whether a product is a medical device is the first step in any regulatory strategy. Manufacturers should always consult the latest published legislation and official regulatory guidance when assessing intended purpose, product claims and the applicable regulatory framework before placing a product on the market.
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