Trigger finger, left index finger

This code signifies stenosing tenosynovitis affecting the flexor tendon of the left index finger, commonly known as trigger finger. This condition is characterized by inflammation and narrowing of the tendon sheath, causing the digit to catch or lock when flexed and extended.

Apply this code when documentation explicitly states a diagnosis of trigger finger specifically affecting the left index finger. Supporting documentation should include physical exam findings consistent with triggering or locking of the left index finger, and may mention pain or tenderness at the base of the digit.

• Ensure the laterality (left) and specific digit (index finger) are clearly documented.
• Distinguish from other finger conditions like Dupuytren's contracture or carpal tunnel syndrome.
• If multiple fingers are affected, assign a separate code for each affected digit and laterality.