Separation of muscle (nontraumatic), unspecified upper arm

This diagnosis code indicates a spontaneous or atraumatic separation of muscle fibers in the upper arm, meaning it was not caused by an injury or external force. It represents a non-traumatic disruption of muscle tissue integrity, often due to underlying conditions or overuse, without specifying which particular muscle is affected.

Use this code when documentation clearly states a "separation of muscle" in the upper arm that is explicitly noted as non-traumatic or spontaneous. This code is appropriate when the specific muscle involved is not identified, and there is no history of injury, accident, or external force leading to the muscle separation.

• Ensure documentation explicitly states "nontraumatic" or "spontaneous" muscle separation to differentiate from traumatic muscle tears.
• Avoid using this code if a specific muscle (e.g., biceps, triceps) is identified; instead, look for more specific codes within M62.0-.
• Do not use for muscle strains or sprains, which typically imply a traumatic event and have different code categories.