ICD-10-CM Diagnosis Code M65.942 - Unspecified synovitis and tenosynovitis, left hand (original) (raw)

M65.942 is a billable diagnosis code used to specify a medical diagnosis of unspecified synovitis and tenosynovitis, left hand. The code is valid during the current fiscal year for the submission of HIPAA-covered transactions from October 01, 2025 through September 30, 2026.

Unspecified diagnosis codes like M65.942 are acceptable when clinical information is unknown or not available about a particular condition. Although a more specific code is preferable, unspecified codes should be used when such codes most accurately reflect what is known about a patient's condition. Specific diagnosis codes should not be used if not supported by the patient's medical record.