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  2. ICD-10-CM Codes List
  3. G00–G99
  4. G40-G47
  5. Vascular syndromes of brain in cerebrovascular diseases (G46)

Vascular syndromes of brain in cerebrovascular diseases (G46)

The ICD-10 code G46 covers vascular syndromes of the brain related to cerebrovascular diseases, which are conditions caused by problems with blood flow in the brain’s arteries. These codes specifically identify different types of brain syndromes caused by artery blockages or strokes affecting distinct vascular territories.

Codes such as G46.0 (Middle cerebral artery syndrome) and G46.1 (Anterior cerebral artery syndrome) pinpoint vascular syndromes tied to specific arteries. For example, G46.0 includes terms like malignant middle cerebral artery syndrome and middle cerebral artery occlusion, helping coders assign accurate diagnoses when conditions result in neurological deficits and strokes in the middle cerebral artery region. Similarly, G46.3 (Brain stem stroke syndrome) covers infarctions and syndromes affecting the brainstem, including recognized conditions like Millard-Gubler and Claude’s syndromes. Other codes such as pure motor lacunar syndrome (G46.5) and pure sensory lacunar syndrome (G46.6) denote smaller, localized strokes affecting motor or sensory pathways. Using these codes ensures precise documentation of various brain vascular syndromes in cerebrovascular disease cases.

Instructional Notations

Code First

Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions, the ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists, there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation.

  • underlying cerebrovascular disease I60 I69