Is G03 a billable ICD-10-CM code?

No. G03 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does G03 sit in the tabular list?

Diseases of the nervous system (G00-G99), in the block Inflammatory diseases of the central nervous system (G00-G09).

What cannot be coded together with G03?

G03 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.

G03

G03 — Meningitis due to other and unspecified causes

Non-billable headerICD-10-CM

G03 is a non-billable header ICD-10-CM code for meningitis due to other and unspecified causes. 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.

meningoencephalitis (G04.-)
meningomyelitis (G04.-)

Includes

Conditions this code covers.

arachnoiditis NOS
leptomeningitis NOS
meningitis NOS
pachymeningitis NOS

Risk adjustment

G03 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 G03

5 child codes. Green means billable.

Questions about G03

Is G03 a billable ICD-10-CM code?: No. G03 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does G03 sit in the tabular list?: Diseases of the nervous system (G00-G99), in the block Inflammatory diseases of the central nervous system (G00-G09).
What cannot be coded together with G03?: G03 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.