NGSP News

Updated August 2026

New CMS Rule: Impact on HbA1c PT

Effective January 1, 2025, Hemoglobin A1c became a CLIA-regulated analyte and all U.S. HbA1c proficiency testing surveys have been required to adopt acceptable limits of +/-8%. However, labs accredited by CAP that participate in the CAP GH-5 survey are required to show evidence of passing +/-6% and document corrective action for results outside of these limits in order to maintain their CAP accreditation.