# Premarket approval (PMA)

> The FDA's most rigorous review pathway for high-risk Class III medical devices, requiring scientific evidence of safety and effectiveness.

Source: https://www.quantisnow.com/glossary/pma
Topic: Glossary / Biotech and FDA
Also known as: PMA, PMA approval, premarket approval application
Last updated: 2026-10-27

Premarket approval (PMA) is the FDA's review process for Class III medical devices, those that support or sustain human life, are of substantial importance in preventing impairment of health, or present a potentially unreasonable risk of illness or injury. Examples include implantable heart valves, pacemakers and some diagnostic tests. A PMA requires valid scientific evidence that the device is safe and effective for its intended use.

## How it works

Unlike [510(k) clearance](https://www.quantisnow.com/glossary/510k-clearance), which relies on comparison to an existing device, a PMA must stand on its own evidence. That usually means clinical studies, often run under an investigational device exemption (IDE), the device equivalent of an [IND](https://www.quantisnow.com/glossary/ind). The application includes clinical and nonclinical data, manufacturing information and proposed labeling.

The FDA conducts a filing review, a substantive scientific review, and usually an inspection of manufacturing facilities. For novel or high-profile devices it may refer the application to an expert advisory panel, similar to an [advisory committee](https://www.quantisnow.com/glossary/advisory-committee) for drugs. The statute calls for a decision within 180 days, though total review time is often longer when the FDA requests additional information. Outcomes include approval, an approvable letter, a not-approvable letter or denial.

Changes to an approved device generally require a PMA supplement.

## Why it matters for traders

For a small medtech company betting on one Class III device, the PMA decision is a binary catalyst comparable to a drug [PDUFA date](https://www.quantisnow.com/glossary/pdufa-date). Panel meetings, FDA requests for more data and post-approval study requirements all produce news. Approval can also bring a meaningful competitive moat, since rivals must run their own trials rather than cite a predicate.

## Example

A hypothetical device maker, Clearwater Devices (CLWD), completes a 500-patient pivotal trial of a heart valve under an IDE and submits a PMA. The FDA convenes an advisory panel, which votes in favor, and approval follows about a year after submission. CLWD shares rise 25% on the news.

## FAQ

### What is the difference between PMA and 510(k)?

A PMA requires independent evidence of safety and effectiveness, usually from clinical trials, and applies to high-risk devices. A 510(k) shows equivalence to an existing device.

### Is a PMA like an NDA?

Broadly, yes. It is the device world's equivalent of a full new drug approval.

## Related terms

- [510(k) clearance](https://www.quantisnow.com/glossary/510k-clearance.md): FDA clearance to market a medical device shown to be substantially equivalent to a legally marketed device already on the market.
- [FDA advisory committee (AdCom)](https://www.quantisnow.com/glossary/advisory-committee.md): A panel of outside experts that reviews a drug or device application in a public meeting and votes on questions such as whether benefits outweigh risks.
- [New Drug Application (NDA)](https://www.quantisnow.com/glossary/nda.md): The formal application a drugmaker submits to the FDA requesting approval to market a new small-molecule drug in the United States.
- [Phase 3 clinical trial](https://www.quantisnow.com/glossary/phase-3-trial.md): The large, late-stage trial that tests whether a drug works and is safe in a broad patient population, usually forming the basis for an FDA application.
- [Catalyst](https://www.quantisnow.com/glossary/catalyst.md): An event or piece of news that causes, or is expected to cause, a significant move in a stock's price.

## On Quantisnow

- [Live feed: FDA Approvals](https://www.quantisnow.com/news/fda)
- [Latest FDA approvals and announcements](https://www.quantisnow.com/top/fda-approvals)
- [FDA approval process](https://www.quantisnow.com/guides/fda-approval-process)