What does CLIA certify?

The correct answer is that CLIA certifies all of the above, which encompasses laboratory facilities, lab tests performed in a physician's office, and lab tests performed in a hospital. The Clinical Laboratory Improvement Amendments (CLIA) establish quality standards for laboratory testing in the United States to ensure the accuracy and reliability of lab results, regardless of where the testing takes place.

CLIA applies to all clinical laboratories that perform tests on human specimens, including those in hospitals, private practices, and outpatient settings. This broad coverage is intended to provide a nationwide framework for ensuring all labs meet specific operational standards, including those related to personnel qualifications, quality control, and proficiency testing. By certifying all types of laboratories, CLIA plays a crucial role in maintaining high standards for patient safety and care.