Myositis ossificans traumatica, unspecified thigh

This code describes the development of heterotopic bone formation within muscle tissue of an unspecified thigh, occurring as a direct result of trauma. This condition involves the abnormal growth of bone in soft tissue where bone does not normally exist, specifically triggered by an injury.

Use this code when documentation clearly indicates myositis ossificans in the thigh, and the cause is explicitly linked to a traumatic event, but the specific thigh (left or right) is not documented. This code is appropriate when the physician's notes confirm the diagnosis of myositis ossificans and its traumatic etiology, without laterality specified.

• Always attempt to clarify laterality (left or right thigh) with the provider to use a more specific code.
• Ensure documentation explicitly states "traumatic" to differentiate from progressive or other forms of myositis ossificans.
• Do not use this code if the myositis ossificans is congenital or progressive; refer to M61.1- or M61.2-.