Other rupture of muscle (nontraumatic), left shoulder

This code signifies a spontaneous, non-traumatic tear or disruption of muscle tissue within the left shoulder region. It indicates a rupture that is not caused by an external force or injury, but rather from internal factors such as overuse, degeneration, or disease.

Apply this code when documentation clearly states a non-traumatic rupture of a muscle in the left shoulder. This includes conditions like rotator cuff tears due to degenerative changes, or spontaneous muscle tears without a history of acute injury. Physician notes should explicitly exclude any traumatic etiology.

• Ensure documentation specifies "nontraumatic" or "spontaneous" to differentiate from traumatic muscle ruptures (S46.XX2 codes).
• Verify the specific muscle involved in the left shoulder, if documented, to ensure this general code is appropriate or if a more specific code exists.
• Always review the entire medical record for any underlying systemic conditions that might contribute to spontaneous muscle rupture, and code them accordingly as secondary diagnoses.