Myositis ossificans progressiva, right thigh

This code describes a rare, progressive genetic disorder characterized by the formation of bone in muscles, tendons, ligaments, and other connective tissues, specifically affecting the right thigh. This heterotopic ossification leads to severe immobility and functional impairment as the soft tissues are gradually replaced by bone.

Use this code for patients diagnosed with myositis ossificans progressiva (also known as fibrodysplasia ossificans progressiva) when the right thigh is identified as an affected site. Documentation should clearly indicate the diagnosis and the specific anatomical location of the heterotopic ossification.

• Ensure documentation specifies "progressiva" to differentiate from localized myositis ossificans (traumatic).
• Verify laterality (right, left, bilateral) is clearly documented for the affected thigh.
• Consider additional codes for associated complications, such as contractures or functional limitations.