Is M63 a billable ICD-10-CM code?

No. M63 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does M63 sit in the tabular list?

Diseases of the musculoskeletal system and connective tissue (M00-M99), in the block Disorders of muscles (M60-M63).

What cannot be coded together with M63?

M63 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.

M63

M63 — Disorders of muscle in diseases classified elsewhere

Non-billable headerICD-10-CM

M63 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.

Excludes1 — never code together

These conditions cannot occur together. Billing both on the same encounter is a denial.

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

The underlying condition must be sequenced before this code.

underlying disease, such as:
leprosy (A30.-)
neoplasm (C49.-, C79.89, D21.-, D48.1-)
schistosomiasis (B65.-)
trichinellosis (B75)

Risk adjustment

M63 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

1 child code. Green means billable.

M63.8Disorders of muscle in diseases classified elsewhere

Questions about M63

Is M63 a billable ICD-10-CM code?: No. M63 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does M63 sit in the tabular list?: Diseases of the musculoskeletal system and connective tissue (M00-M99), in the block Disorders of muscles (M60-M63).
What cannot be coded together with M63?: M63 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.