REGULATORY ANSWERS
A plain-English explanation of the FDA 510(k) premarket notification: what it is, who needs one, what it contains, and how long it takes.
A 510(k) is a premarket notification to the US FDA demonstrating that a new medical device is substantially equivalent to a legally marketed device (a predicate). Most moderate-risk (Class II) devices reach the US market through 510(k) clearance rather than full premarket approval.
FDA's review goal for a Traditional 510(k) is 90 FDA days, but total calendar time is commonly 4–9 months once additional-information requests, preparation, and testing are included. Strategy and submission quality are the biggest controllable factors.
A 510(k) demonstrates substantial equivalence to an existing device; a PMA (premarket approval) independently proves safety and effectiveness for high-risk (Class III) devices, usually requiring clinical data. PMAs are substantially longer and costlier.
510(k) clearance means FDA has determined a device is substantially equivalent to a legally marketed predicate device, allowing it to be marketed in the United States. It is a clearance, not an approval.
Anyone who intends to market a Class I, II, or III device intended for human use in the US for which a 510(k) is required — most commonly Class II devices — including manufacturers, specification developers, and certain remarketers.
A predicate device is a legally marketed device to which a new device is compared to demonstrate substantial equivalence — same intended use and same technological characteristics, or differences that do not raise new questions of safety or effectiveness.
Costs include the FDA user fee (reduced for qualified small businesses), testing, and preparation. Total cost varies widely with device complexity and testing scope — testing is usually the largest driver.
