M63 — Disorders of muscle in diseases classified elsewhere
Is M63 billable?
No — M63 is a non-billable header code. M63 groups more specific codes and cannot be submitted on a claim. A valid ICD-10-CM code must be reported at the highest level of specificity available in its branch. Select one of the 24 billable codes beneath M63.
Billable codes under this header
- M63.80Disorders of muscle in diseases classified elsewhere, unspecified site
- M63.88Disorders of muscle in diseases classified elsewhere, other site
- M63.89Disorders of muscle in diseases classified elsewhere, multiple sites
- M63.811Disorders of muscle in diseases classified elsewhere, right shoulder
- M63.812Disorders of muscle in diseases classified elsewhere, left shoulder
- M63.819Disorders of muscle in diseases classified elsewhere, unspecified shoulder
- M63.821Disorders of muscle in diseases classified elsewhere, right upper arm
- M63.822Disorders of muscle in diseases classified elsewhere, left upper arm
- M63.829Disorders of muscle in diseases classified elsewhere, unspecified upper arm
- M63.831Disorders of muscle in diseases classified elsewhere, right forearm
- M63.832Disorders of muscle in diseases classified elsewhere, left forearm
- M63.839Disorders of muscle in diseases classified elsewhere, unspecified forearm
- M63.841Disorders of muscle in diseases classified elsewhere, right hand
- M63.842Disorders of muscle in diseases classified elsewhere, left hand
- M63.849Disorders of muscle in diseases classified elsewhere, unspecified hand
- M63.851Disorders of muscle in diseases classified elsewhere, right thigh
- M63.852Disorders of muscle in diseases classified elsewhere, left thigh
- M63.859Disorders of muscle in diseases classified elsewhere, unspecified thigh
- M63.861Disorders of muscle in diseases classified elsewhere, right lower leg
- M63.862Disorders of muscle in diseases classified elsewhere, left lower leg
- M63.869Disorders of muscle in diseases classified elsewhere, unspecified lower leg
- M63.871Disorders of muscle in diseases classified elsewhere, right ankle and foot
- M63.872Disorders of muscle in diseases classified elsewhere, left ankle and foot
- M63.879Disorders of muscle in diseases classified elsewhere, unspecified ankle and foot
M63 at a glance
| Code | M63 |
|---|---|
| Description | Disorders of muscle in diseases classified elsewhere |
| Billable | No — header code |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Excludes1 — never code together
The conditions below can never be reported together with M63 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
Code first
The underlying condition below must be sequenced before M63. M63 describes a manifestation and cannot be the principal or first-listed diagnosis.
Excludes1 — never code together — inherited from M60-M63
The conditions below can never be reported together with M63 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
Excludes2 — not included here — inherited from Chapter 13
The conditions below are not part of M63, but a patient may have both at the same time. When documentation supports it, M63 and the excluded code may both be reported.
- 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)
Excludes2 — not included here — inherited from M60-M63
The conditions below are not part of M63, but a patient may have both at the same time. When documentation supports it, M63 and the excluded code may both be reported.
- muscular dystrophies and myopathies (G71-G72)
What codes fall under M63? (1)
How long has M63 existed?
M63 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.
Which codes are confused with M63?
ICD-10-CM declares these codes mutually exclusive with M63 — exactly one of each pair can be correct for a given encounter.