Is Q03 a billable ICD-10-CM code?

No. Q03 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does Q03 sit in the tabular list?

Congenital malformations, deformations and chromosomal abnormalities (Q00-QA0), in the block Congenital malformations of the nervous system (Q00-Q07).

What cannot be coded together with Q03?

Q03 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.

Q03

Q03 — Congenital hydrocephalus

Non-billable headerICD-10-CM

Q03 is a non-billable header ICD-10-CM code for congenital hydrocephalus. 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.

Arnold-Chiari syndrome, type II (Q07.0-)
acquired hydrocephalus (G91.-)
hydrocephalus due to congenital toxoplasmosis (P37.1)
hydrocephalus with spina bifida (Q05.0-Q05.4)

Includes

Conditions this code covers.

hydrocephalus in newborn

Other codes that can never be billed with Q03

These codes carry an Excludes1 note pointing at Q03. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading Q03 alone.

Q75Other congenital malformations of skull and face bones
G91Hydrocephalus

Risk adjustment

Q03 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 Q03

4 child codes. Green means billable.

Questions about Q03

Is Q03 a billable ICD-10-CM code?: No. Q03 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does Q03 sit in the tabular list?: Congenital malformations, deformations and chromosomal abnormalities (Q00-QA0), in the block Congenital malformations of the nervous system (Q00-Q07).
What cannot be coded together with Q03?: Q03 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.