The U.S. Food and Drug Administration (FDA) provides two main regulatory routes for bringing non-PMA (Premarket Approval) medical devices to market: the 510(k) Premarket Notification and the De Novo Classification Request . Each pathway addresses different device types, and selecting the right one is essential for regulatory compliance, smooth market entry, and long-term business growth. 510(k) Premarket Notification The 510(k) pathwa y applies when a medical device is substantially equivalent to a legally marketed predicate device. Manufacturers must demonstrate: Same intended use as the predicate Similar technological characteristics, or provide evidence proving safety and effectiveness despite differences Once the FDA confirms substantial equivalence, it issues a Substantially Equivalent (SE) Letter , which serves as official FDA clearance, allowing the device to be marketed in the U.S. Typical Review Timeline: ~90 calendar days De Novo Classification The De Novo ...