Summary
The HbA1C is the most validated marker of average glycemia and long-term complications. However, certain patient conditions can affect the HbA1C value. Learn more here about explanations for possible HbA1C discordance. Updated March 2026.
Featured Authors
Mohammad Shalabe, MD, MSBS, PA-C
University of Toledo
Kathleen Dungan, MD, MPH
The Ohio State University
Colin Crowe, MD
Case Western Reserve University