I67.4 Hypertensive encephalopathy

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

Excludes2 (not included here)

• insufficiency, NOS, of precerebral arteries (G45.2)

Code also

• , if applicable, associated hypertensive conditions such as:
• essential (primary) hypertension (I10)
• hypertensive chronic kidney disease (I12.-)
• hypertensive heart and chronic kidney disease (I13.-)
• hypertensive heart disease (I11.-)

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)

Risk adjustment (HCC)

• RxHCC V08: HCC 187 — Hypertension

MS-DRG index

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

Approximate ICD-9-CM (GEMs)

• 437.2 Hypertensive encephalopathy

Code annotations containing back-references to I67.4

Back-references to I67.4

• Type 1 Excludes: G93.2 Benign intracranial hypertension ("hypertensive encephalopathy (I67.4)")
• Type 2 Excludes: G93.4 Other and unspecified encephalopathy ("hypertensive encephalopathy (I67.4)")
• Use Additional: I16.1 Hypertensive emergency ("hypertensive encephalopathy (I67.4)")

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 I67.4

• Degeneration, degenerative › cerebrovascular › due to hypertension
• Encephalopathy (acute) › hypertensive
• Hypertension, hypertensive (accelerated) (benign) (essential) (idiopathic) (malignant) (systemic) › encephalopathy
• Lesion (s) (nontraumatic) › brain › vascular › hypertensive
• Lesion (s) (nontraumatic) › cerebrovascular › hypertensive

Nearby codes

• I67 Other cerebrovascular diseases
• I67.0 Dissection of cerebral arteries, nonruptured
• I67.1 Cerebral aneurysm, nonruptured
• I67.2 Cerebral atherosclerosis
• I67.3 Progressive vascular leukoencephalopathy
• I67.4 Hypertensive encephalopathy (this code)
• I67.5 Moyamoya disease
• I67.6 Nonpyogenic thrombosis of intracranial venous system
• I67.7 Cerebral arteritis, not elsewhere classified
• I67.8 Other specified cerebrovascular diseases
• I67.81 Acute cerebrovascular insufficiency