All ICD10 Codes

M63

Non-Billable
ChapterM00–M99
Rankcategory
Official Description

Disorders of muscle in diseases classified elsewhere

Use a more specific code (0 billable, 1 non-billable)
M63.8Disorders of muscle in diseases classified elsewherehas subcodes
Metadata & Insights
  • •Non-billable category (requires more specific sub-code).
  • •Chapter 13: Diseases of the Musculoskeletal System and Connective Tissue (M00-M99).

CH13 Parent Instructions

Excludes2(Not included here. Code separately if applicable.)
  • 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)

M60-M63 Parent Instructions

Excludes1(Not coded here. Use a different code.)
  • 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. Code separately if applicable.)
  • muscular dystrophies and myopathies (G71-G72)

Instructional Notes

Excludes1(Not coded here. Use a different code.)
  • 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

Clinical Hierarchy

BillableHas subcodes
CH13Diseases of the musculoskeletal system and connective tissue (M00-M99)
M60-M63Disorders of muscles (M60-M63)
M63Disorders of muscle in diseases classified elsewhereNot billable
M63.8Disorders of muscle in diseases classified elsewhereSubcodes

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to M63:

blockM60-M63
Disorders of muscles (M60-M63)
View context instructions
chapterCH13
Diseases of the musculoskeletal system and connective tissue (M00-M99)
View context instructions

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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