Separation of muscle (nontraumatic), unspecified forearm

This code describes a condition where muscle fibers in an unspecified forearm spontaneously detach or pull apart from their normal anatomical attachments or from each other, without being caused by an external injury or trauma. This is a non-traumatic event, indicating an underlying pathological process rather than an acute force.

Use this code when documentation clearly states a non-traumatic separation or rupture of a forearm muscle, and the specific muscle affected is not identified. This typically applies to cases where the patient presents with pain, swelling, or functional impairment in the forearm, and imaging or clinical examination confirms muscle separation without evidence of an acute traumatic event.

• Ensure documentation explicitly states "nontraumatic" to differentiate from traumatic muscle injuries.
• Avoid this code if a specific forearm muscle (e.g., biceps, triceps) is identified; instead, use a more specific code from the M62.03- subcategory.
• If the cause of the non-traumatic separation is known (e.g., due to a disease), consider sequencing the underlying condition first, if applicable.