Hemoglobin A1c (HbA1c)
What it measures
HbA1c reflects average blood sugar over the prior 3 months by measuring the percentage of hemoglobin with glucose attached. It's the standard test for diagnosing and monitoring diabetes.
When it’s ordered
Diabetes diagnosis (≥6.5% confirms), monitoring known diabetes (target typically <7.0%), pre-diabetes screening (5.7–6.4%).
Medicare coverage
Governed by NCD 190.21. For diabetes that is under control, Medicare allows the test about once every 3 months (4 times a year). It allows one more per 3-month period when diabetes is not controlled or treatment changes. The diagnosis on the order must be one the rule lists, such as diabetes.
Typical price
Medicare allowable around $9–13. Commercial cash prices range from $20 to $120.
Look up the current Medicare allowable for Hemoglobin A1c (HbA1c) →
Rates and coverage rules shown apply to Original Medicare (Fee-for-Service) only. Medicare Advantage plans may differ. See our data sources →