Is G46 a billable ICD-10-CM code?

No. G46 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does G46 sit in the tabular list?

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

G46

G46 — Vascular syndromes of brain in cerebrovascular diseases

Non-billable headerICD-10-CM

G46 is a non-billable header ICD-10-CM code for vascular syndromes of brain in cerebrovascular diseases. It cannot be billed on its own: choose one of the more specific child codes below.

Code first

The underlying condition must be sequenced before this code.

underlying cerebrovascular disease (I60-I69)

Risk adjustment

G46 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 G46

9 child codes. Green means billable.

G46.0Middle cerebral artery syndrome
G46.1Anterior cerebral artery syndrome
G46.2Posterior cerebral artery syndrome
G46.3Brain stem stroke syndrome
G46.4Cerebellar stroke syndrome
G46.5Pure motor lacunar syndrome
G46.6Pure sensory lacunar syndrome
G46.7Other lacunar syndromes
G46.8Other vascular syndromes of brain in cerebrovascular diseases

Questions about G46

Is G46 a billable ICD-10-CM code?: No. G46 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does G46 sit in the tabular list?: Diseases of the nervous system (G00-G99), in the block Episodic and paroxysmal disorders (G40-G47).