Is G90.8 a billable ICD-10-CM code?

No. G90.8 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does G90.8 sit in the tabular list?

Diseases of the nervous system (G00-G99), in the block Other disorders of the nervous system (G89-G99).

What cannot be coded together with G90.8?

G90.8 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above G90.8 (G90) and apply to it just the same.

G90.8

G90.8 — Other disorders of autonomic nervous system

Non-billable headerICD-10-CM

G90.8 is a non-billable header ICD-10-CM code for other disorders of autonomic nervous system. It cannot be billed on its own: choose one of the more specific child codes below.

Excludes1 inherited from the categories above G90.8

These are not written on G90.8, but they bind it: a note on a category applies to every code beneath it. Billing G90.8 with anything listed here is a denial.

Written on G90 — Disorders of autonomic nervous system

dysfunction of the autonomic nervous system due to alcohol (G31.2)

Risk adjustment

G90.8 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 history

What changed, and when. Derived by diffing consecutive CMS release files — which matters when you are defending a code assigned under an earlier edition.

deletedFY2024-FY2026
Other disorders of autonomic nervous system

Code to one of these instead G90.8

2 child codes. Green means billable.

Related codes at this level

Codes that share G90. If G90.8 is not quite right, the correct code is usually one of these.

Questions about G90.8

Is G90.8 a billable ICD-10-CM code?: No. G90.8 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does G90.8 sit in the tabular list?: Diseases of the nervous system (G00-G99), in the block Other disorders of the nervous system (G89-G99).
What cannot be coded together with G90.8?: G90.8 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above G90.8 (G90) and apply to it just the same.