Calcifcn and ossifictn of muscles assoc w burns, unsp thigh

This code signifies the pathological hardening of muscle tissue in an unspecified thigh due to the formation of calcium deposits and bone-like structures. This condition, known as myositis ossificans, is a recognized complication following burn injuries.

Apply this code when documentation explicitly states calcification or ossification of thigh muscles as a sequela of a burn, and the specific thigh (left or right) is not documented. This typically occurs in the chronic phase of burn recovery.

• Ensure documentation clearly links the myositis ossificans to a prior burn injury.
• Do not use this code if the laterality of the affected thigh is specified; instead, use the more specific M61.351 or M61.352.
• Code the underlying burn injury (T20-T32 series) as an additional diagnosis, if still relevant to the current encounter.