M60.8Other myositis

M60.8 is the ICD-10-CM diagnosis code for other myositis. It belongs to category M60 (myositis), 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 M60, choose M60.8 (Other myositis) only when documentation doesn't support a more specific option: infective myositis (M60.0), interstitial myositis (M60.1), foreign body granuloma of soft tissue, not elsewhere classified (M60.2) and unspecified (M60.9).

To report this condition, pick the subcode that matches the documentation: M60.80 (unspecified site), M60.81 (shoulder), M60.82 (upper arm), M60.83 (forearm), M60.84 (hand), M60.85 (thigh), M60.86 (lower leg), M60.87 (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.