For compliant diabetes patients, HbA1c should be tested how often?

• A. Every 6 months
• B. Every 3 months
• C. Every 12 months
• D. Every 9 months

Answer: (A)

Stability of glycemic control guides how often HbA1c is checked. If a compliant patient has reached and maintained target control, HbA1c is typically measured every six months. HbA1c reflects the average glucose over roughly the past 2–3 months, so with steady control a six‑month interval is enough to confirm continued benefit. If the patient's control is not at goal or therapy has recently been changed, testing is done more frequently, usually every three months, to assess the response to treatment.