US lawFederal (United States)RegulationsTitle 42 CFR — Public HealthChapter IV — CENTERS FOR MEDICARE & MEDICAID SERVICES, DEPARTMENT OF HEALTH AND HUMAN SERVICESPart 493 — LABORATORY REQUIREMENTSSubpart H — Participation in Proficiency Testing for Laboratories Performing Nonwaived Testing493.82142 C.F.R. § 493.821Condition: Microbiology.Last amended: 2017Year: 2026Length: 19 wordsOfficial source Cite as 42 C.F.R. § 493.821 (2026)The specialty of microbiology includes, for purposes of proficiency testing, the subspecialties of bacteriology, mycobacteriology, mycology, parasitology and virology.Previous42 C.F.R. § 493.807Next42 C.F.R. § 493.823