M62.559

Muscle wasting and atrophy, not elsewhere classified, unspecified thigh

FY2027Chapter 13: Diseases of the musculoskeletal system and connective tissue/M60–M63 Disorders of muscles

BillableComplete code, valid to report

Excludes1
Excludes2

M62.559 (also written M62559) is a billable ICD-10-CM diagnosis code for muscle wasting and atrophy, not elsewhere classified, unspecified thigh. It is part of the FY2027 code set, effective October 1, 2026. It is one of the 131 codes in category M62 (Other disorders of muscle). Its coding notes include 15 Excludes1 entries and 13 Excludes2 entries.

Excludes1

Not coded here. The listed conditions generally should not be reported together.

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

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

Inherited from M62 Other disorders of muscle

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

Also from chapter/block level (7 notes)

Inherited from M60–M63 Disorders of muscles

dermatopolymyositis (M33.-)
myopathy in amyloidosis (E85.-)
myopathy in polyarteritis nodosa (M30.0)
myopathy in rheumatoid arthritis (M05.32)
myopathy in scleroderma (M34.-)
myopathy in Sjögren's syndrome (M35.03)
myopathy in systemic lupus erythematosus (M32.-)

Excludes2

Not included here. Both codes may be reported if the patient has both conditions.

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

pelvic muscle wasting (N81.84)

Inherited from M62 Other disorders of muscle

nontraumatic hematoma of muscle (M79.81)

Also from chapter/block level (11 notes)

Inherited from M60–M63 Disorders of muscles

muscular dystrophies and myopathies (G71-G72)

Inherited from Chapter 13 Diseases of the musculoskeletal system and connective tissue

arthropathic psoriasis (L40.5-)
certain conditions originating in the perinatal period (P04-P96)
certain infectious and parasitic diseases (A00-B99)
compartment syndrome (traumatic) (T79.A-)
complications of pregnancy, childbirth and the puerperium (O00-O9A)
congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
endocrine, nutritional and metabolic diseases (E00-E88)
injury, poisoning and certain other consequences of external causes (S00-T88)
neoplasms (C00-D49)
symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)

Notes

Also from chapter/block level (1 note)

Inherited from Chapter 13 Diseases of the musculoskeletal system and connective tissue

Use an external cause code following the code for the musculoskeletal condition, if applicable, to identify the cause of the musculoskeletal condition