Regulatory Framework Overview
The United States has one of the world's most comprehensive medical device regulatory frameworks, administered by the U.S. Food and Drug Administration (FDA) under authority granted by the Federal Food, Drug, and Cosmetic Act (FD&C Act).
The legislative foundation
| Legislation | Role |
|---|---|
| FD&C Act (21 U.S.C. § 301 et seq.) | Primary statute — defines devices, establishes FDA's authority, creates the classification and approval/clearance framework |
| Medical Device Amendments of 1976 | Established the current three-class system and premarket review requirements |
| Safe Medical Devices Act 1990 | Added post-market surveillance, MDR requirements, device tracking |
| FDA Modernization Act 1997 | Streamlined the 510(k) process, added Special 510(k) and Abbreviated 510(k) |
| FDASIA 2012 | Introduced De Novo as a standalone pathway, MDUFA III |
| 21st Century Cures Act 2016 | Breakthrough Device Designation, software provisions, Predetermined Change Control Plans |
| MDUFA VI (2022) | Current user fee agreement — sets performance goals and timelines |
The three-class system
FDA classifies medical devices into three classes based on the level of control necessary to assure safety and effectiveness:
| Class | Risk | Controls Required | Market pathway |
|---|---|---|---|
| Class I | Lowest | General controls only | Exempt or 510(k) |
| Class II | Moderate | General + special controls | 510(k) clearance (most) |
| Class III | Highest | General controls + PMA | PMA approval |
The three market pathways
- 510(k) Clearance — Demonstrates substantial equivalence to a legally marketed predicate device. Used for most Class II devices and some Class I devices.
- De Novo Classification — For novel, low-to-moderate risk devices with no valid predicate. Creates a new Class I or Class II device type.
- Premarket Approval (PMA) — Required for Class III devices. Requires valid scientific evidence of safety and effectiveness.
General controls — the baseline
General controls apply to all device classes and include:
- Establishment registration and device listing (21 CFR Part 807)
- Labelling requirements (21 CFR Part 801)
- Quality System Regulation / QMSR (21 CFR Part 820)
- Medical Device Reporting (21 CFR Part 803)
- Reporting corrections and removals (21 CFR Part 806)
- Premarket notification where required
Key FDA programmes and databases
| Programme / Database | Purpose |
|---|---|
| 510(k) Database | Search cleared devices and predicates |
| PMA Database | Search approved devices |
| GUDID / AccessGUDID | Global Unique Device Identification Database |
| MAUDE | Manufacturer and User Facility Device Experience database (MDRs) |
| CARES | Complaint and recall tracking |
| eSTAR | Electronic submission templates |
| Q-Submissions (Pre-Sub) | Early interaction with FDA before submission |