M60-M63 — Disorders of muscles
ICD-10-CM codes M60-M63 cover disorders of muscles, within diseases of the musculoskeletal system and connective tissue. The block holds 556 codes across 4 categories, of which 420 are billable and 136 are header codes that cannot be submitted on a claim.
Excludes1 — never code together
These conditions cannot occur together. Billing both on the same encounter is a denial.
Excludes2 — not included here, but may coexist
The excluded condition is not part of this code, but a patient can have both. You may code both.
What else to watch in M60-M63
- 240 codes are laterality-specific. They come in left and right pairs, and the pair is mutually exclusive on a single site: coding both without a bilateral code is a contradiction a scrubber should catch before the payer does.
- 420 codes are named in Medicare coverage policies. An LCD or NCD lists them as supporting medical necessity, or explicitly as not supporting it. Which applies depends on the MAC for your state.