M62.5Muscle wasting and atrophy, not elsewhere classified

M62.5 is the ICD-10-CM diagnosis code for muscle wasting and atrophy, not elsewhere classified. 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 11 subcodes must be used instead.

Within M62 (other disorders of muscle), M62.5 is specifically for muscle wasting and atrophy, not elsewhere classified. Related codes cover separation of muscle (nontraumatic) (M62.0), other rupture of muscle (nontraumatic) (M62.1), nontraumatic ischemic infarction of muscle (M62.2), Immobility syndrome (paraplegic) (M62.3), contracture of muscle (M62.4), other specified disorders of muscle (M62.8) and disorder of muscle, unspecified (M62.9).

To report this condition, pick the subcode that matches the documentation: M62.50 (unspecified site), M62.51 (shoulder), M62.52 (upper arm), M62.53 (forearm), M62.54 (hand), M62.55 (thigh), M62.56 (lower leg), M62.57 (ankle and foot) and 3 more.

Don't report M62.5 together with the conditions in its Excludes1 note: neuralgic amyotrophy (G54.5), progressive muscular atrophy (G12.21) and sarcopenia (M62.84).

The conditions in its Excludes2 note aren't part of M62.5, but may be coded alongside it if the patient has both: pelvic muscle wasting (N81.84).

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