Paralytic calcifcn and ossification of muscle, unsp thigh

This code signifies the presence of abnormal calcium deposits and bone formation within the muscle tissue of an unspecified thigh, specifically occurring as a consequence of paralysis. This condition, known as myositis ossificans, develops in denervated or severely injured muscle, leading to restricted movement and pain. The "unspecified thigh" indicates that the exact location within the thigh (e.g., anterior, posterior) is not documented.

Use this code when documentation clearly indicates paralytic myositis ossificans affecting the thigh, and the specific thigh (right or left) is not specified. This code is appropriate when imaging studies (e.g., X-ray, CT scan) confirm calcification and ossification within the muscle, and the patient's history includes paralysis as the underlying cause.

• Ensure documentation specifies "paralytic" to differentiate from traumatic or progressive myositis ossificans.
• Avoid using this code if the laterality of the thigh (right or left) is documented; instead, use the more specific M61.251 or M61.252.
• Code any underlying paralysis or neurological condition first, as this condition is a sequela.