Myositis ossificans traumatica, right shoulder

This code signifies the presence of myositis ossificans, a condition characterized by heterotopic bone formation within muscle tissue, specifically in the right shoulder, and attributed to a traumatic event. This non-neoplastic process results in the development of mature lamellar bone in soft tissues where bone does not normally exist.

Apply this code when documentation clearly indicates the diagnosis of myositis ossificans in the right shoulder, and the etiology is explicitly linked to a prior trauma. This diagnosis is typically confirmed by imaging studies (e.g., X-ray, CT scan) showing calcification or ossification within the muscle, alongside a history of injury to the affected area.

• Ensure documentation specifies "traumatica" as the cause; otherwise, consider M61.1- (Myositis ossificans progressiva) or M61.2- (Myositis ossificans with other specified causes).
• Laterality is crucial; verify the right shoulder is explicitly documented.
• Do not confuse with calcific tendinitis or other soft tissue calcifications; myositis ossificans involves bone formation within muscle.