G46.0 — Middle cerebral artery syndrome
G46.0 is a billable, specific ICD-10-CM code for middle cerebral artery syndrome. It is valid for submission on a claim.
Risk adjustment
G46.0 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.
Medicare coverage
G46.0 is named in 42 Medicare coverage policies — 42 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A52868Billing and Coding: Transesophageal Echocardiography (TEE)
- A52992Billing and Coding: Non-Invasive Cerebrovascular Arterial Studies
- A52992Billing and Coding: Non-Invasive Cerebrovascular Arterial Studies
- A54111Billing and Coding: Speech Language Pathology (SLP) Services: Communication Disorders
How G46.0 is indexed
Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to G46.0.
- Syndrome›cerebral›artery›middle
Related codes at this level
Codes that share G46. If G46.0 is not quite right, the correct code is usually one of these.
Questions about G46.0
- Is G46.0 a billable ICD-10-CM code?
- Yes. G46.0 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does G46.0 sit in the tabular list?
- Diseases of the nervous system (G00-G99), in the block Episodic and paroxysmal disorders (G40-G47).