Calcifcn and ossifictn of muscles assoc w burns, mult sites

This code signifies the pathological hardening of muscle tissue due to calcium deposits and bone formation, specifically occurring in multiple muscle sites as a complication following burn injuries. This condition, known as myositis ossificans traumatica or heterotopic ossification, can lead to pain and restricted range of motion.

Apply this code when documentation clearly indicates the presence of calcification and ossification within multiple muscles, and explicitly links these changes as a sequela of a burn injury. Supporting documentation should include imaging reports (e.g., X-rays, CT scans) confirming the heterotopic ossification and a history of burn trauma.

• Ensure the documentation specifies "multiple sites" of muscle involvement; otherwise, a site-specific code may be more appropriate.
• Always sequence the burn code (T20-T32) as the primary diagnosis, followed by this code as a secondary diagnosis to fully capture the etiology.
• Differentiate from other forms of myositis ossificans not associated with burns, which would require different M61 subcategories.