M62.539 Muscle wasting and atrophy, not elsewhere classified, unspecified forearm

Billable ICD-10-CM code, FY2026.

Applies from M62 Other disorders of muscle

Excludes1 (never code together)

• alcoholic myopathy (G72.1)
• cramp and spasm (R25.2)
• drug-induced myopathy (G72.0)
• myalgia (M79.1-)
• stiff-man syndrome (G25.82)

Excludes2 (not included here)

• nontraumatic hematoma of muscle (M79.81)

Applies from M62.5 Muscle wasting and atrophy, not elsewhere classified

Applicable to

• Disuse atrophy NEC

Excludes1 (never code together)

• neuralgic amyotrophy (G54.5)
• progressive muscular atrophy (G12.21)
• sarcopenia (M62.84)

Excludes2 (not included here)

• pelvic muscle wasting (N81.84)

MS-DRG index

Defines the logic of DRG(s) 557-558 in MDC 08.

Approximate ICD-9-CM (GEMs)

• 728.2 Muscular wasting and disuse atrophy, not elsewhere classified (approximate)

Nearby codes

• M62.522 Muscle wasting and atrophy, not elsewhere classified, left upper arm
• M62.529 Muscle wasting and atrophy, not elsewhere classified, unspecified upper arm
• M62.53 Muscle wasting and atrophy, not elsewhere classified, forearm
• M62.531 Muscle wasting and atrophy, not elsewhere classified, right forearm
• M62.532 Muscle wasting and atrophy, not elsewhere classified, left forearm
• M62.539 Muscle wasting and atrophy, not elsewhere classified, unspecified forearm (this code)
• M62.54 Muscle wasting and atrophy, not elsewhere classified, hand
• M62.541 Muscle wasting and atrophy, not elsewhere classified, right hand
• M62.542 Muscle wasting and atrophy, not elsewhere classified, left hand
• M62.549 Muscle wasting and atrophy, not elsewhere classified, unspecified hand
• M62.55 Muscle wasting and atrophy, not elsewhere classified, thigh