Q07.0 — Arnold-Chiari syndrome
Q07.0 is a non-billable header ICD-10-CM code for arnold-chiari syndrome. 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.
Inclusion terms
Alternative wordings a physician may use in the chart for this same code.
- Arnold-Chiari syndrome, type II
Excludes2 inherited from the categories above Q07.0
Also inherited, and the opposite of Excludes1: these conditions are not part of Q07.0, but a patient can have both, so you may code both.
Other codes that can never be billed with Q07.0
These codes carry an Excludes1 note pointing at Q07.0. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading Q07.0 alone.
Risk adjustment
Q07.0 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 history
Q07.0 has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.
Code to one of these instead Q07.0
4 child codes. Green means billable.
Related codes at this level
Codes that share Q07. If Q07.0 is not quite right, the correct code is usually one of these.
Questions about Q07.0
- Is Q07.0 a billable ICD-10-CM code?
- No. Q07.0 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
- Where does Q07.0 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 Q07.0?
- Q07.0 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter.