M63
Non-billableDisorders of muscle in diseases classified elsewhere
Disorders of muscle in diseases classified elsewhere
This is a header/category code. For billing purposes, use a more specific child code from the list below.
Coding Notes
Excludes 1
Codes that cannot be used together with this code (mutual exclusion)
- •dermatopolymyositisM33
- •myopathy in amyloidosisE85
- •myopathy in polyarteritis nodosaM30.0
- •myopathy in rheumatoid arthritisM05.32
- •myopathy in sclerodermaM34
- •myopathy in Sjögren's syndromeM35.03
- •myopathy in systemic lupus erythematosusM32
- •myopathy in cysticercosisB69.81
- •myopathy in endocrine diseasesG73.7
- •myopathy in metabolic diseasesG73.7
- •myopathy in sarcoidosisD86.87
- •myopathy in secondary syphilisA51.49
- •myopathy in syphilis (late)A52.78
- •myopathy in toxoplasmosisB58.82
- •myopathy in tuberculosisA18.09
Excludes 2
Conditions not included here, but the patient may have both
- •arthropathic psoriasisL40.5
- •certain conditions originating in the perinatal periodP04-P96
- •certain infectious and parasitic diseasesA00-B99
- •compartment syndrome (traumatic)A-)T79
- •complications of pregnancy, childbirth and the puerperiumO9A)O00
- •congenital malformations, deformations, and chromosomal abnormalitiesQ00-Q99
- •endocrine, nutritional and metabolic diseasesE00-E88
- •injury, poisoning and certain other consequences of external causesS00-T88
- •neoplasmsC00-D49
- •symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classifiedR00-R94
- •muscular dystrophies and myopathiesG71-G72
Code First
The underlying condition must be sequenced before this code
- underlying disease, such as:
- •leprosyA30
- •neoplasm, , ,C49, C79.89, D21, D48.1
- •schistosomiasisB65
- •trichinellosisB75
Child Codes (1)
ICD-11 Equivalents(1)
ICD-11 Equivalents
View full mappingCorresponding ICD-11 codes from the WHO crosswalk mapping
Also Known As / Clinical Terms(1)
Frequently Asked Questions
What is the ICD-10 code for disorders of muscle in diseases classified elsewhere?
The ICD-10-CM code for disorders of muscle in diseases classified elsewhere is M63. The full clinical description is "Disorders of muscle in diseases classified elsewhere". M63 is a non-billable header code. Use a more specific child code for billing purposes.
What does ICD-10 code M63 mean?
ICD-10-CM code M63 represents “Disorders of muscle in diseases classified elsewhere”. It is classified under Chapter 13: Diseases of the Musculoskeletal System and Connective Tissue and is a non-billable header code. Use a more specific child code for billing purposes.
Is M63 a billable code?
No, M63 is a non-billable header code. You need to use one of its more specific child codes for billing. There are 1 child codes under M63.
What chapter is M63 in?
M63 is in Chapter 13: Diseases of the Musculoskeletal System and Connective Tissue (codes M00-M99).
What codes cannot be used with M63?
M63 has Excludes1 notes indicating codes that cannot be used together with it, including: dermatopolymyositis (M33.-); myopathy in amyloidosis (E85.-); myopathy in polyarteritis nodosa (M30.0); and 12 more.
What are the subcategories under M63?
M63 has 1 child code, including: M63.8 (Disorders of muscle in diseases classified elsewhere).
What are the UMLS CUIs for M63?
M63 is linked to 1 UMLS Concept Unique Identifier: C0694520. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.
How does M63 relate to ICF functioning codes?
ICF (International Classification of Functioning, Disability and Health) codes describe how conditions like disorders of muscle in diseases classified elsewhere affect a person's functioning — body functions, activities, participation, and environmental factors. AutoICD provides ICF Core Sets for 12+ conditions and can map clinical text to ICF categories automatically. Browse the ICF directory to explore functioning codes.
What is the ICD-11 equivalent of M63?
M63 maps to the ICD-11 code: FB33 (Secondary disorders of muscle).
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Includes SNOMED Clinical Terms® (SNOMED CT®) used by permission of SNOMED International. Includes content from the UMLS Metathesaurus, courtesy of the U.S. National Library of Medicine.