FDA revokes LDT rule

Sept. 24, 2025

On March 31st, the ruling for the Association for Molecular Pathology’s lawsuit against the U.S. Food and Drug Administration over the regulation of laboratory-developed test procedures was announced. The FDA has officially revoked their May 6, 2024 rule.

According to the new final rule, 21 CFR 809.3(a) will no longer say “including when the manufacturer of these products is a laboratory.” Instead, it will return to what it was before May 6, 2024.

About the Author

Erin Brady

Managing Editor

Erin Brady is Managing Editor of Medical Laboratory Observer.

Sign up for Medical Laboratory Observer eNewsletters