I67.1 Cerebral aneurysm, nonruptured

Billable ICD-10-CM code, FY2026.

Applicable to

• Cerebral aneurysm NOS
• Cerebral arteriovenous fistula, acquired
• Internal carotid artery aneurysm, intracranial portion
• Internal carotid artery aneurysm, NOS

Excludes1 (never code together)

• congenital cerebral aneurysm, nonruptured (Q28.-)
• ruptured cerebral aneurysm (I60.7)

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) 091-093 in MDC 01.

Approximate ICD-9-CM (GEMs)

• 437.3 Cerebral aneurysm, nonruptured (approximate)

Code annotations containing back-references to I67.1

Back-references to I67.1

• Type 1 Excludes: I60.7 Nontraumatic subarachnoid hemorrhage from unspecified intracranial artery ("berry aneurysm, nonruptured (I67.1)")
• Type 2 Excludes: I72 Other aneurysm ("cerebral (nonruptured) aneurysm (I67.1)")
• Type 1 Excludes: I72.0 Aneurysm of carotid artery ("aneurysm of internal carotid artery, intracranial portion (I67.1)")
• Type 1 Excludes: I72.0 Aneurysm of carotid artery ("aneurysm of internal carotid artery NOS (I67.1)")
• Type 2 Excludes: I77.0 Arteriovenous fistula, acquired ("cerebral (I67.1)")

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 I67.1

• Aneurysm (anastomotic) (artery) (cirsoid) (diffuse) (false) (fusiform) (multiple) (saccular) › arteriosclerotic › cerebral
• Aneurysm (anastomotic) (artery) (cirsoid) (diffuse) (false) (fusiform) (multiple) (saccular) › arteriovenous (congenital) › acquired › brain
• Aneurysm (anastomotic) (artery) (cirsoid) (diffuse) (false) (fusiform) (multiple) (saccular) › berry (congenital) (nonruptured)
• Aneurysm (anastomotic) (artery) (cirsoid) (diffuse) (false) (fusiform) (multiple) (saccular) › brain
• Aneurysm (anastomotic) (artery) (cirsoid) (diffuse) (false) (fusiform) (multiple) (saccular) › brain › arteriosclerotic
• Aneurysm (anastomotic) (artery) (cirsoid) (diffuse) (false) (fusiform) (multiple) (saccular) › brain › arteriovenous (congenital) (nonruptured) › acquired
• Aneurysm (anastomotic) (artery) (cirsoid) (diffuse) (false) (fusiform) (multiple) (saccular) › brain › berry (congenital) (nonruptured)
• Aneurysm (anastomotic) (artery) (cirsoid) (diffuse) (false) (fusiform) (multiple) (saccular) › brain › meninges
• Aneurysm (anastomotic) (artery) (cirsoid) (diffuse) (false) (fusiform) (multiple) (saccular) › brain › miliary (congenital) (nonruptured)
• Aneurysm (anastomotic) (artery) (cirsoid) (diffuse) (false) (fusiform) (multiple) (saccular) › brain › mycotic
• Aneurysm (anastomotic) (artery) (cirsoid) (diffuse) (false) (fusiform) (multiple) (saccular) › carotid artery (common) (external) › internal (intracranial)
• Aneurysm (anastomotic) (artery) (cirsoid) (diffuse) (false) (fusiform) (multiple) (saccular) › cavernous sinus
• Aneurysm (anastomotic) (artery) (cirsoid) (diffuse) (false) (fusiform) (multiple) (saccular) › circle of Willis
• Aneurysm (anastomotic) (artery) (cirsoid) (diffuse) (false) (fusiform) (multiple) (saccular) › miliary (congenital)
• Fistula (cutaneous) › arteriovenous (acquired) (nonruptured) › brain
• Fistula (cutaneous) › brain › arteriovenous (acquired)

Nearby codes

• I67 Other cerebrovascular diseases
• I67.0 Dissection of cerebral arteries, nonruptured
• I67.1 Cerebral aneurysm, nonruptured (this code)
• I67.2 Cerebral atherosclerosis
• I67.3 Progressive vascular leukoencephalopathy
• I67.4 Hypertensive encephalopathy
• I67.5 Moyamoya disease
• I67.6 Nonpyogenic thrombosis of intracranial venous system