I67.850 Cerebral autosomal dominant arteriopathy with subcortical infarcts and leukoencephalopathy

Billable ICD-10-CM code, FY2026. Acts as a Complication or Comorbidity (CC) as a secondary diagnosis.

Applicable to

• CADASIL

Code also

• any associated diagnoses, such as:
• epilepsy (G40.-)
• stroke (I63.-)
• vascular dementia (F01.-)

Applies from I67 Other cerebrovascular diseases

Excludes1 (never code together)

• Occlusion and stenosis of cerebral artery causing cerebral infarction (I63.3-I63.5-)
• Occlusion and stenosis of precerebral artery causing cerebral infarction (I63.2-)

Excludes2 (not included here)

• sequelae of the listed conditions (I69.8)

MS-DRG index

Defines the logic of DRG(s) 070-072 in MDC 01.

Code annotations containing back-references to I67.850

Back-references to I67

• Type 1 Excludes: G31.84 Mild cognitive impairment of uncertain or unknown etiology ("cerebrovascular diseases (I60-I69)")
• Code First: G46 Vascular syndromes of brain in cerebrovascular diseases ("underlying cerebrovascular disease (I60-I69)")
• Type 2 Excludes: I10 Essential (primary) hypertension ("essential (primary) hypertension involving vessels of brain (I60-I69)")
• Type 2 Excludes: I15 Secondary hypertension ("secondary hypertension involving vessels of brain (I60-I69)")

Diagnosis Index entries for I67.850

• Arteriopathy › cerebral autosomal dominant, with subcortical infarcts and leukoencephalopathy (CADASIL)
• CADASIL (cerebral autosomal dominant arteriopathy with subcortical infarcts and leukoencephalopathy)

Nearby codes

• I67.83 Posterior reversible encephalopathy syndrome
• I67.84 Cerebral vasospasm and vasoconstriction
• I67.841 Reversible cerebrovascular vasoconstriction syndrome
• I67.848 Other cerebrovascular vasospasm and vasoconstriction
• I67.85 Hereditary cerebrovascular diseases
• I67.850 Cerebral autosomal dominant arteriopathy with subcortical infarcts and leukoencephalopathy (this code)
• I67.858 Other hereditary cerebrovascular disease
• I67.89 Other cerebrovascular disease
• I67.9 Cerebrovascular disease, unspecified