MCMCB Pro
M63.8

M63.8Disorders of muscle in diseases classified elsewhere

Non-billable headerICD-10-CM

M63.8 is a non-billable header ICD-10-CM code for disorders of muscle in diseases classified elsewhere. It cannot be billed on its own: choose one of the more specific child codes below.

Risk adjustment

M63.8 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

Code to one of these instead M63.8

10 child codes. Green means billable.

Questions about M63.8

Is M63.8 a billable ICD-10-CM code?
No. M63.8 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does M63.8 sit in the tabular list?
Diseases of the musculoskeletal system and connective tissue (M00-M99), in the block Disorders of muscles (M60-M63).
ICD-10-CMFY2026-Apr· effective April 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release — see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.