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Title 42

Displaying title 42, up to date as of 7/16/2026. Title 42 was last amended 7/01/2026.
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Title 42Public HealthPart / Section
Chapter IVCenters for Medicare & Medicaid Services, Department of Health and Human Services400 – 699
Subchapter GStandards and Certification482 – 498
Part 493Laboratory Requirements493.1 – 493.2001
Subpart HParticipation in Proficiency Testing for Laboratories Performing Nonwaived Testing493.801 – 493.865
§ 493.801Condition: Enrollment and testing of samples.
§ 493.803Condition: Successful participation.
§ 493.807Condition: Reinstatement of laboratories performing nonwaived testing.
Proficiency Testing by Specialty and Subspecialty for Laboratories Performing Tests of Moderate Complexity (Including the Subcategory), High Complexity, or Any Combination of These Tests493.821 – 493.865
§ 493.821Condition: Microbiology.
§ 493.823Standard; Bacteriology.
§ 493.825Standard; Mycobacteriology.
§ 493.827Standard; Mycology.
§ 493.829Standard; Parasitology.
§ 493.831Standard; Virology.
§ 493.833Condition: Diagnostic immunology.
§ 493.835Standard; Syphilis serology.
§ 493.837Standard; General immunology.
§ 493.839Condition: Chemistry.
§ 493.841Standard; Routine chemistry.
§ 493.843Standard; Endocrinology.
§ 493.845Standard; Toxicology.
§ 493.849Condition: Hematology.
§ 493.851Standard; Hematology.
§ 493.853Condition: Pathology.
§ 493.855Standard; Cytology: gynecologic examinations.
§ 493.857Condition: Immunohematology.
§ 493.859Standard; ABO group and D (Rho) typing.
§ 493.861Standard; Unexpected antibody detection.
§ 493.863Standard; Compatibility testing.
§ 493.865Standard; Antibody identification.