Myositis ossificans traumatica, left ankle and foot

This code describes the formation of heterotopic bone within muscle or soft tissue of the left ankle and foot, specifically resulting from a traumatic injury. This condition is characterized by the abnormal growth of bone in non-osseous tissue, often presenting as a firm, painful mass.

Apply this code when documentation clearly indicates myositis ossificans in the left ankle or foot, and the etiology is directly linked to a prior trauma. Supporting documentation should include imaging reports (e.g., X-ray, CT scan) confirming heterotopic ossification and a history of injury to the affected area.

• Ensure the documentation specifies "traumatica" to differentiate from other forms of myositis ossificans.
• Verify the laterality (left) and anatomical site (ankle and foot) are explicitly stated in the medical record.
• Consider sequencing this code after an acute injury code if the myositis ossificans is a direct complication of a recent trauma.