U.S. Code of Federal Regulations

Regulations most recently checked for updates: Sep 16, 2025

All TitlesTitle 42Chapter IVPart 493Subpart A - Subpart A—General Provisions
§ 493.1 - Basis and scope.
§ 493.2 - Definitions.
§ 493.3 - Applicability.
§ 493.5 - Categories of tests by complexity.
§ 493.15 - Laboratories performing waived tests.
§ 493.17 - Test categorization.
§ 493.19 - Provider-performed microscopy (PPM) procedures.
§ 493.20 - Laboratories performing tests of moderate complexity.
§ 493.25 - Laboratories performing tests of high complexity.
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