Myositis ossificans traumatica, right upper arm

This code describes the development of heterotopic bone formation within muscle tissue of the right upper arm, specifically resulting from trauma. It represents a non-neoplastic, benign condition where bone forms in soft tissues that do not normally ossify, typically following an injury.

Use this code when documentation clearly indicates myositis ossificans in the right upper arm and specifies a traumatic etiology. This diagnosis is often made based on imaging studies (e.g., X-ray, MRI) showing mature lamellar bone within muscle, coupled with a history of trauma to the affected area.

• Ensure documentation specifies "traumatica" to differentiate from progressive or other forms of myositis ossificans.
• Verify the laterality (right upper arm) is explicitly stated in the medical record.
• Do not confuse with calcification of soft tissue not associated with bone formation, or with other types of heterotopic ossification.