Myositis ossificans progressiva, left foot

This code signifies a rare, progressive genetic disorder characterized by the abnormal formation of bone in muscles, tendons, ligaments, and other connective tissues, specifically affecting the left foot. This heterotopic ossification leads to significant pain, swelling, and progressive loss of joint mobility in the affected area.

Assign this code when documentation confirms a diagnosis of fibrodysplasia ossificans progressiva (FOP) with involvement of the left foot. This diagnosis is typically established through clinical presentation, imaging studies (e.g., X-rays, CT scans showing heterotopic bone formation), and genetic testing.

• Ensure documentation clearly specifies "progressiva" to differentiate from localized myositis ossificans.
• Verify laterality; this code is specific to the left foot.
• Consider sequencing this code as a primary diagnosis if it is the reason for the encounter, or as a secondary diagnosis if managing complications.