M61.5Other ossification of muscle

M61.5 is the ICD-10-CM diagnosis code for other ossification of muscle. It belongs to category M61 (calcification and ossification of muscle), block M60-M63 (disorders of muscles) and chapter 13 (diseases of the musculoskeletal system and connective tissue). It is a header code, so it can't be reported by itself; one of its 10 subcodes must be used instead.

Within M61, choose M61.5 (Other ossification of muscle) only when documentation doesn't support a more specific option: myositis ossificans traumatica (M61.0), myositis ossificans progressiva (M61.1), paralytic calcification and ossification of muscle (M61.2), s associated with burns (M61.3), other calcification of muscle (M61.4) and unspecified (M61.9).

To report this condition, pick the subcode that matches the documentation: M61.50 (unspecified site), M61.51 (shoulder), M61.52 (upper arm), M61.53 (forearm), M61.54 (hand), M61.55 (thigh), M61.56 (lower leg), M61.57 (ankle and foot) and 2 more.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.