Myositis ossificans traumatica, unspecified forearm

This code signifies the presence of myositis ossificans, a condition characterized by the formation of bone within muscle tissue, specifically in the forearm, resulting from a traumatic injury. This heterotopic ossification leads to a firm, often painful mass within the muscle, restricting range of motion. The "unspecified" nature indicates that the laterality of the forearm (left or right) is not documented.

Utilize this code when documentation clearly states a diagnosis of myositis ossificans traumatica affecting the forearm, and the specific side (left or right) is not specified. This typically occurs following a significant muscle contusion, strain, or fracture in the forearm area. Supporting documentation should include clinical findings consistent with heterotopic ossification and a history of trauma.

• Ensure the documentation explicitly links the myositis ossificans to a traumatic event.
• If laterality (left or right forearm) is documented, select the more specific code (M61.031 or M61.032).
• Do not use this code for myositis ossificans that is not explicitly stated as post-traumatic; consider other M61 subcategories.