In Vitro Diagnostic Device Classification: A Practical Guide to Getting It Right

**Summary:** Correct IVD classification determines your regulatory pathway—a Class I exemption takes weeks, Class II 510(k) takes 6–12 months, and Class III PMA takes 18–36 months and millions in costs. The FDA classifies IVDs under 21 CFR Parts 862–892 based on risk level, with each device assigned a product code and class that dictates required evidence, controls, and post-market obligations.