M62.5AMuscle wasting and atrophy, not elsewhere classified, back

M62.5A is the ICD-10-CM diagnosis code for muscle wasting and atrophy, not elsewhere classified, back. It belongs to category M62 (other disorders 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 4 subcodes must be used instead.

Within M62.5 (muscle wasting and atrophy, not elsewhere classified), M62.5A is specifically for muscle wasting and atrophy, not elsewhere classified, back. Related codes cover unspecified site (M62.50), shoulder (M62.51), upper arm (M62.52), forearm (M62.53), hand (M62.54), thigh (M62.55), lower leg (M62.56), ankle and foot (M62.57) and 2 more.

To report this condition, pick the subcode that matches the documentation: M62.5A0 (cervical), M62.5A1 (thoracic), M62.5A2 (lumbosacral) and M62.5A9 (unspecified level).

It was added in FY2023, effective October 1, 2022.