Clinical Laboratory Improvement Amendments (CLIA)

The Clinical Laboratory Improvement Amendments of 1988 (CLIA) regulations include federal standards applicable to all U.S. facilities or sites that test human specimens for health assessment or to diagnose, prevent, or treat disease. CDC, in partnership with CMS and FDA, supports the CLIA program and clinical laboratory quality. Learn more about CLIA.

CDC has Retired the Laboratory Search Tool

On January 16, 2024, CDC retired its CLIA Laboratory Search tool. You can find laboratory demographic information on the CMS website, here: Select “CLIA Laboratory Lookup” under “Tool” in the left-hand navigation. Please email CMS directly at for inquiries about data in their lookup.

Clinical Laboratory Improvement Advisory Committee (CLIAC)

Find information about the Clinical Laboratory Improvement Advisory Committee (CLIAC), which is managed by the Centers for Disease Control and Prevention (CDC), provides scientific and technical advice and guidance to the Department of Health and Human Services (HHS).

Get Answers to CLIA Related Questions

Find links for answers to frequently asked questions on the CLIA Quick Tips page or email CMS directly.

Find the Laboratory Quality Portal

Laboratories are on the frontline for protecting our communities’ health. CDC provides clinical and public health laboratories with training and technical assistance to help them achieve the highest-quality laboratory science while ensuring the safety of laboratory professionals and the communities where they work. Learn more about CDC’s laboratory quality efforts.