M63.83

Disorders of muscle in diseases classified elsewhere, forearm

Header / non-billable

This code does not map to a risk-adjusting HCC in the loaded models.

Coding notes

Excludes 1 never coded together · Excludes 2 may co-exist

Inherited from M63Disorders of muscle in diseases classified elsewhere
Excludes 1

myopathy in cysticercosis (B69.81) myopathy in endocrine diseases (G73.7) myopathy in metabolic diseases (G73.7) myopathy in sarcoidosis (D86.87) myopathy in secondary syphilis (A51.49) myopathy in syphilis (late) (A52.78) myopathy in toxoplasmosis (B58.82) myopathy in tuberculosis (A18.09)

Code first

underlying disease, such as: leprosy (A30.-) neoplasm (C49.-, C79.89, D21.-, D48.1-) schistosomiasis (B65.-) trichinellosis (B75)

Inherited from M60-M63Disorders of muscles
Excludes 1

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.-)

Excludes 2

muscular dystrophies and myopathies (G71-G72)

Inherited from chapter 13Diseases of the musculoskeletal system and connective tissue
Excludes 2

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)

Note

Use an external cause code following the code for the musculoskeletal condition, if applicable, to identify the cause of the musculoskeletal condition (M00-M25) Arthropathies (M00-M25) Includes: Disorders affecting predominantly peripheral (limb) joints (M40-M54) Dorsopathies (M40-M54) (M60-M79) Soft tissue disorders (M60-M79) (M80-M94) Osteopathies and chondropathies (M80-M94)

Official Guidelines for M63.83

FY 2026 ›