ICD-10-CM 2027
ICD-10 code for Avellis' syndrome
From the official ICD-10-CM alphabetic index entry “Avellis' syndrome”. Page updated September 29, 2026.
About coding Avellis' syndrome
The ICD-10-CM code for Avellis' syndrome is G46.8 (Other vascular syndromes of brain in cerebrovascular diseases).
Within G46, choose G46.8 (Other vascular syndromes of brain in cerebrovascular diseases) only when documentation doesn't support a more specific option: middle cerebral artery syndrome (G46.0), anterior cerebral artery syndrome (G46.1), posterior cerebral artery syndrome (G46.2), brain stem stroke syndrome (G46.3), cerebellar stroke syndrome (G46.4), pure motor lacunar syndrome (G46.5), pure sensory lacunar syndrome (G46.6) and other lacunar syndromes (G46.7).
Code first: underlying cerebrovascular disease (I60-I69).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
Common questions about Avellis' syndrome ICD-10 codes
What is the ICD-10 code for Avellis' syndrome?
- G46.8 — Other vascular syndromes of brain in cerebrovascular diseases.
Is G46.8 billable?
- Yes. G46.8 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can G46.8 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict G46.8 as a principal diagnosis.
Is G46.8 a CC or MCC?
- No. G46.8 is neither a CC nor an MCC under MS-DRG v44.0.