SOM Appendix C has been updated for labs

June 26, 2025

The Centers for Medicare & Medicaid Services (CMS) has announced updates to the State Operations Manual (SOM), Appendix C – Survey Procedures and Interpretive Guidelines for Laboratories and Laboratory Services (Clinical Laboratory Improvement Amendments (CLIA).

Key revisions:

·       Chapter 6 surgery procedures have been omitted.

·       Guidelines and “new and revised D-tags for the regulations finalized in the Clinical Laboratory Improvement Amendments of 1988 (CLIA) Proficiency Testing – Analytes and Acceptable Performance Final Rule (CMS-3355-F) and Clinical Laboratory Improvement Amendments of 1988 (CLIA) Fees, Histocompatibility, Personnel, and Alternative Sanctions for Certificate of Waiver Laboratories Final Rule (CMS-3326-F)” are included.

·       Details are included from past QSO and memos.

·       The addition of “approved HHS training program for neuromuscular pathology.”

·       Comments from stakeholders were considered and included.

·       Omitting certain guidelines from the Appendix C advance copy.

·       “Correcting clerical errors” from the Appendix C advance copy.

EXPIRED: Memos: S&C: 17-11-CLIA, S&C: 16-02-CLIA, and S&C: 15-17-CLIA.

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