FDA 510(k) / De Novo / PMA
In plain words
In the United States, a medical device, including some software and AI tools, normally needs the FDA's permission before it can be marketed. There are three main routes:
- 510(k): the manufacturer shows the device is "substantially equivalent" to a device already legally on the market (the "predicate"). The result is called clearance.
- De Novo: for a genuinely new kind of device of low to moderate risk with no suitable predicate. The result is a De Novo grant.
- PMA (premarket approval): for the highest-risk devices. The result is called approval.
Healthcare example (illustrative)
Imagine three hypothetical tools. One measures heart chamber size on echocardiograms in much the same way as a tool already on the market; its maker would probably look at the 510(k) route. A second, first-of-its-kind tool predicts delirium after surgery from anaesthetic records, with nothing similar available; De Novo might fit. A third directly controls a high-risk therapy; PMA would be more likely. The manufacturer and the FDA decide the route, not the clinician.
A little more technical
The route depends on the device's risk and on whether a comparable device exists, not on whether it uses AI. The FDA's guidance on change plans for AI devices applies to all three routes (see #31). The FDA keeps a list of authorised AI-enabled devices, which it says is not comprehensive (see #116); checking it is a quick first step when a vendor says a tool is "FDA authorised". Pathway details are set by the FDA and can change, so rely on the primary source rather than summaries.
Don't learn this yet
Skip submission contents, review procedures, fees and device classification codes. That is the work of regulatory affairs teams. As a clinician, knowing which route a tool took and what that implies is enough.