What an FDA product code is
A product code is a three-letter identifier that FDA assigns to a device category within a classification regulation. It connects three things that otherwise live in separate places: the regulation number in 21 CFR, the device class (I, II or III), and the premarket submission type the category usually requires.
When you register and list a device, cite a predicate in a 510(k), or check whether a category is exempt from premarket notification, the product code is the key you search by. Two devices with similar names can sit under different codes with different regulatory burdens, so finding the right code early shapes your whole program.
How the three-letter system fits together
Each product code sits inside a hierarchy:
- Medical specialty panel — 21 CFR parts 862–892 group devices by clinical specialty, such as cardiovascular (part 870) or radiology (part 892).
- Classification regulation — a numbered section, for example 21 CFR 870.1025, that defines the device type, its class and any special controls.
- Product code — the three-letter identifier, for example DXN, that tags devices listed under that regulation.
The same regulation can hold several product codes when device subtypes differ in risk or technology. Conversely, a novel device authorized through De Novo creates a brand-new regulation and product code that later sponsors can use as a predicate.
Step by step: finding the right code
- Write your intended use in one sentence — what the product does, for whom, and in what setting.
- Search the FDA Product Classification Database by device name keywords from that sentence, not by what you call the product commercially.
- Read the regulation text for each candidate code. The definition language controls, not the marketing category.
- Check the device class and submission type shown for the code: 510(k), PMA, De Novo, or exempt.
- Search the 510(k) and De Novo databases for that code to confirm real devices have been cleared under it, and read their intended-use statements.
You can start with our free FDA product code lookup, which searches the same classification data by device description and shows class, regulation number and specialty panel in one table.
What the code tells you about your pathway
| Signal from the code | What it usually means |
|---|---|
| Class I, 510(k) exempt | Register and list; no premarket submission, but quality system and labeling rules still apply. |
| Class II, 510(k) required | Find a predicate, demonstrate substantial equivalence, plan for special controls and performance testing. |
| Class II with De Novo history | A novel category exists — a De Novo or a 510(k) citing the De Novo-created regulation may both be viable. |
| Class III / PMA | Expect clinical evidence requirements and the longest review timeline. |
The database shows the category's default pathway. Your specific device can shift that answer — confirm with the regulation text and, when in doubt, a Q-Submission.
Common mistakes when choosing a code
- Searching by brand or marketing terms instead of clinical function — the database indexes device names, not product names.
- Stopping at the first plausible code instead of reading the regulation definitions of the top three candidates.
- Ignoring the intended-use statement of predicates: a code match with a mismatched intended use still fails substantial equivalence.
- Assuming 'exempt' means unregulated — registration, listing, labeling and quality-system obligations remain.
- Forgetting software: a hardware code may not cover a software-only function even inside the same specialty panel.
Frequently asked questions
Can one device have more than one product code?
Yes. Combination products and multi-function devices can list under multiple codes, and FDA can assign additional codes when a device spans categories. Each code carries its own class and submission expectations, so map each function deliberately.
What if no existing code fits my device?
A genuinely novel low-to-moderate risk device with no predicate is a De Novo candidate. De Novo authorization creates a new classification regulation and product code, which later devices can then cite as predicates.
Does the product code determine my review timeline?
Indirectly. The code signals class and submission type, and those drive timeline: traditional 510(k) reviews target about 90 FDA days, De Novo longer, and PMA the longest. Special controls and guidance documents attached to the code shape the evidence you must generate.
Where does MedTechCompass get its product-code suggestions?
The Regulatory Analyzer searches the same FDA classification data, ranks candidate codes against your free-text device description, and shows the class and pathway implications with citations so you can verify each suggestion at the source.
Go deeper with MedTechCompass
Describe your device in plain language and get an AI-assisted triage: likely FDA class, product codes, premarket pathway, EU MDR and UK considerations — plus market attractiveness scoring across curated global markets.
This article is educational content from CAHIR Solutions and is not legal or regulatory advice. Regulatory decisions depend on your specific intended use and claims — confirm them with FDA resources, a qualified consultant, or a pre-submission meeting before filing.