ICD-10-CM 2027
ICD-10 code for cerebrovascular acute insufficiency
From the official ICD-10-CM alphabetic index entry “Insufficiency, insufficient › cerebrovascular (acute)”. Page updated September 29, 2026.
About coding cerebrovascular acute insufficiency
The ICD-10-CM code for cerebrovascular acute insufficiency is I67.81 (Acute cerebrovascular insufficiency). The official index lists 1 more specific code, so check the documentation for details such as type, cause, site or severity before settling on I67.81.
Within I67.8 (other specified cerebrovascular diseases), I67.81 is specifically for acute cerebrovascular insufficiency. Related codes cover cerebral ischemia (I67.82), posterior reversible encephalopathy syndrome (I67.83), cerebral vasospasm and vasoconstriction (I67.84), hereditary cerebrovascular diseases (I67.85) and other cerebrovascular disease (I67.89).
As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.
In MS-DRG v44.0, it is part of the grouping logic for DRG 061 (Ischemic Stroke, Precerebral Occlusion or Transient Ischemia with Thrombolytic Agent with MCC, relative weight 2.7211), DRG 062 (Ischemic Stroke, Precerebral Occlusion or Transient Ischemia with Thrombolytic Agent with CC, relative weight 1.7781), DRG 063 (Ischemic Stroke, Precerebral Occlusion or Transient Ischemia with Thrombolytic Agent without CC/MCC, relative weight 1.455) and DRG 069 (Transient Ischemia without Thrombolytic, relative weight 0.7964), in MDC 01 (Diseases and Disorders of the Nervous System), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
More specific cerebrovascular acute insufficiency codes (official index)
- with transient focal neurological signs and symptoms G45.8 — Other transient cerebral ischemic attacks and related syndromes
Common questions about cerebrovascular acute insufficiency ICD-10 codes
What is the ICD-10 code for cerebrovascular acute insufficiency?
- I67.81 — Acute cerebrovascular insufficiency. More specific codes apply when the documentation supports them: G45.8.
Is I67.81 billable?
- Yes. I67.81 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can I67.81 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict I67.81 as a principal diagnosis.
Is I67.81 a CC or MCC?
- I67.81 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.