Regulations last checked for updates: Feb 13, 2026

Title 42 - Public Health last revised: Feb 02, 2026
All TitlesTitle 42Chapter IVPart 493Subpart H - Subpart H—Participation in Proficiency Testing for Laboratories Performing Nonwaived Testing
View all text of Subpart H [§ 493.801 - § 493.865]
§ 493.833 - Condition: Diagnostic immunology.

The specialty of diagnostic immunology includes for purposes of proficiency testing the subspecialties of syphilis serology and general immunology.

authority: 42 U.S.C. 263a,1302,1395x,1395x
source: 55 FR 9576, Mar. 14, 1990, unless otherwise noted.
cite as: 42 CFR 493.833
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