Is G43.A a billable ICD-10-CM code?

No. G43.A is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does G43.A sit in the tabular list?

Diseases of the nervous system (G00-G99), in the block Episodic and paroxysmal disorders (G40-G47).

What cannot be coded together with G43.A?

G43.A carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.

G43.A

G43.A — Cyclical vomiting

Non-billable headerICD-10-CM

G43.A is a non-billable header ICD-10-CM code for cyclical vomiting. 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.

cyclical vomiting syndrome unrelated to migraine (R11.15)

Other codes that can never be billed with G43.A

These codes carry an Excludes1 note pointing at G43.A. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading G43.A alone.

R11Nausea and vomiting
R11.15Cyclical vomiting syndrome unrelated to migraine

Risk adjustment

G43.A 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 G43.A

2 child codes. Green means billable.

Related codes at this level

Codes that share G43. If G43.A is not quite right, the correct code is usually one of these.

Questions about G43.A

Is G43.A a billable ICD-10-CM code?: No. G43.A is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does G43.A sit in the tabular list?: Diseases of the nervous system (G00-G99), in the block Episodic and paroxysmal disorders (G40-G47).
What cannot be coded together with G43.A?: G43.A carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.