MDR Device Classification Explained: How to Classify Your Medical Device
The MDR classifies medical devices into Class I, IIa, IIb, and III by risk. Here is the step-by-step classification process and the Annex VIII rules that drive it.
Category
Device Classification & Conformity
46 in-depth guides in this cluster
MDR Annex VIII Classification Rules: The Complete Guide for Startups
MDR Annex VIII contains 22 classification rules. Here is the complete guide to how they work, grouped by device family, with the traps startups miss.
Class I Medical Devices Under MDR: What Startups Need to Know
Class I is the lightest MDR path, but it is not a free pass. Here is what Class I actually requires, what self-certification means, and when you still need a Notified Body.
Class IIa Medical Devices Under MDR: Requirements and Conformity Routes
Class IIa devices require Notified Body involvement under MDR. Here are the three conformity assessment routes, the requirements, and what the NB actually checks.
Class IIb Medical Devices Under MDR: The Regulatory Burden Explained
Class IIb under MDR is a meaningful step up in regulatory burden from IIa. Here is what Class IIb actually requires, the conformity routes, and what founders underestimate.
Class III Medical Devices Under MDR: The Highest Risk Category Demystified
Class III is the highest MDR risk category. Here is what it requires, including the Article 54/55 consultation procedures, and whether your startup should even try.
How to Apply MDR Classification Rule 1: Non-Invasive Devices
MDR Annex VIII Rule 1 classifies non-invasive devices that do not contact the patient or contact only intact skin. Here is how to apply it.
How to Apply MDR Classification Rule 2: Channeling or Storing for Administration
MDR Annex VIII Rule 2 classifies non-invasive devices that channel or store substances for administration. Here is how to apply it.
How to Apply MDR Classification Rules 3 and 4: Devices That Modify Biological or Chemical Composition
MDR Annex VIII Rules 3 and 4 cover non-invasive devices that modify biological or chemical composition. Here is how to apply them.
How to Apply MDR Classification Rule 5: Invasive Devices in Body Orifices
MDR Annex VIII Rule 5 classifies invasive devices used in body orifices, by duration of use. Here is how to apply it.
How to Apply MDR Classification Rule 6: Surgically Invasive Transient Use Devices
MDR Annex VIII Rule 6 classifies surgically invasive devices for transient use. Here is how to apply it and the escalation conditions.
How to Apply MDR Classification Rule 7: Short-Term Surgically Invasive Devices
MDR Annex VIII Rule 7 classifies surgically invasive devices intended for short-term use. Here is how to apply it.
How to Apply MDR Classification Rule 8: Long-Term Implantable Devices
MDR Annex VIII Rule 8 covers implantable and long-term surgically invasive devices. Here is how to apply it and the Class III escalations.
How to Apply MDR Classification Rule 9: Active Therapeutic Devices
MDR Annex VIII Rule 9 classifies active therapeutic devices by the energy exchange they mediate. Here is how to apply it.
How to Apply MDR Classification Rule 10: Active Diagnostic Devices
MDR Annex VIII Rule 10 classifies active diagnostic and monitoring devices. Here is how to apply the IIa baseline and the IIb escalations.
How to Apply MDR Classification Rule 11: Software as a Medical Device
MDR Annex VIII Rule 11 classifies most medical device software as Class IIa or higher. Here is how to apply Rule 11 correctly and when Class IIb or III applies.
How to Apply MDR Classification Rule 12: Active Devices That Administer Medicinal Products
MDR Annex VIII Rule 12 classifies active devices that administer or exchange medicinal products. Here is how to apply it correctly.
How to Apply MDR Classification Rule 13: Devices Incorporating a Medicinal Substance
MDR Annex VIII Rule 13 covers devices that incorporate a medicinal substance. Here is how to apply it and the combination-product boundary.
MDR Classification Rules 14–22: Special Rules for Specific Device Types
MDR Annex VIII Rules 14 to 22 cover special cases — substances, nanomaterials, blood, disinfectants, contact lenses, and more. Here is what each rule does.
MDR Classification of Software: Rule 11 Deep Dive for SaMD Startups
A deep dive into MDR Annex VIII Rule 11 for SaMD startups — each branch, each threshold, each real-world classification call.
MDCG Guidance on Software Classification: Practical Examples for Startups
MDCG 2019-11 Rev.1 contains worked examples for software classification. Here are the ones that matter most for MedTech startups, with the reasoning explained.
Why Your Device Might Be Classified Higher Under MDR Than Under MDD
Many devices end up in a higher class under MDR than they were under MDD. Here are the rule changes that drive upclassification and how to respond.
Up-Classification Under MDR: How to Handle a Surprise Higher Class
When MDR up-classifies your device higher than expected, the workload jumps and the timeline shifts. Here is how to absorb the surprise without losing the project.
Classification Disputes: What to Do When You Disagree with Your Notified Body
When a Notified Body classifies your device higher than you expect, you can argue the case. Here is how to prepare the evidence and the conversation.
MDR Annex IX: Quality Management System-Based Conformity Assessment Explained
Annex IX is the full QMS plus technical documentation assessment route under MDR. Here is how it works and what the Notified Body actually assesses.
MDR Annex X: Type Examination — When and Why You Need It
MDR Annex X type examination is one of the conformity assessment routes for higher-class devices. Here is when it applies and how it differs from Annex IX.
MDR Annex XI: Product Verification and Production Quality Assurance
MDR Annex XI is the production-side conformity assessment route, paired with Annex X type examination. Here is how it works.
Choosing the Right Conformity Assessment Route for Your Startup's Device Class
MDR offers several conformity assessment routes by device class. Here is how to choose the right one and the trade-offs that matter for startups.
The Conformity Assessment Procedure for Class I Devices: A Startup Checklist
The Class I self-certification path is the lightest under MDR, but still has specific steps. Here is the startup checklist from intended purpose to declaration of conformity.
The Conformity Assessment Procedure for Class IIa Devices: Step-by-Step
Class IIa conformity assessment under MDR involves a Notified Body. Here is the step-by-step procedure from QMS preparation to certificate issuance.
The Conformity Assessment Procedure for Class IIb Devices: What to Expect
Class IIb conformity assessment under MDR is a heavier version of the IIa process. Here is what to expect step by step.
The Conformity Assessment Procedure for Class III Devices: The Full Process
Class III conformity assessment under MDR is the heaviest pathway, including Article 54/55 consultation procedures. Here is the full process.
Conformity Assessment for Software as a Medical Device: The Startup Path
SaMD conformity assessment follows the same MDR routes as any other device but with software-specific scrutiny. Here is the startup path from Rule 11 to certificate.
How to Write a Classification Justification Document Under MDR
An MDR classification justification document names the intended purpose, walks every Annex VIII rule, and lands one class. Here is how to write one.
Intended Purpose vs. Intended Use: The Critical Distinction Under MDR Article 2(12)
Intended purpose is the manufacturer's legal statement of what the device is for. Intended use is what users actually do with it. The gap is where MDR trouble starts.
How Your Intended Purpose Drives Every Regulatory Decision Under MDR
Your intended purpose statement decides classification, GSPR scope, clinical evidence, and labeling under MDR. One sentence, every downstream cost.
Claims Management Under MDR: What You Can and Cannot Say
MDR claims management for medical devices: what Article 7 allows, what it forbids, and how to run a claims register that survives a Notified Body audit.
Off-Label Use Under MDR: Legal Implications for Manufacturers
Off-label use is a clinician's call, not the manufacturer's. But the moment you promote, hint at, or ignore it, MDR liability crosses the line onto you.
Multi-Function Devices Under MDR: How to Classify When Multiple Rules Apply
When a device performs multiple functions, multiple Annex VIII rules apply and the highest class wins. Here is how to apply the implementing rule correctly.
Device Classification for Startup Pivots: What Happens When Your Intended Purpose Changes
When a startup pivots its intended purpose, the MDR classification may change. Here is what that triggers, from re-assessment to new NB engagement.
Notified Body Opinion Under MDR Article 54: When Special Consultation Is Required
MDR Article 54 requires a clinical evaluation consultation for certain Class III implantable and Class IIb active devices. Here is when it triggers and what it means.
Scrutiny Procedure Under MDR Article 55: Class III and Implantable Device Reviews
MDR Article 55 sets out the scrutiny mechanism for certain Class III implantable and Class IIb active devices. Here is how it works in practice.
How to Minimize Your Device Classification Without Compromising Intended Purpose
The lowest defensible MDR class for your device is the one with the smallest regulatory burden you can honestly justify. Here is how to find it.
7 Classification Mistakes Startups Make Under MDR (And How to Avoid Them)
The seven most common MDR classification mistakes that cost startups months of rework — each with the Annex VIII rule it violates and how to avoid it.
The Strategic Approach to Classification: Plan Your Class Before You Build
Classification should be decided before the first prototype — not after. Here is the strategic approach that keeps your regulatory burden proportionate to your runway.
Special Class I Devices Under MDR: Is, Im, Ir and the Notified Body
Class I Is, Im, and Ir devices still need a Notified Body under MDR Article 52(7). What that actually means for startups and budgets.