ICD-10-CM 2027
ICD-10 code for brain aneurysm
From the official ICD-10-CM alphabetic index entry “Aneurysm (anastomotic) (artery) (cirsoid) (diffuse) (false) (fusiform) (multiple) (saccular) › brain”. Page updated September 29, 2026.
About coding brain aneurysm
The ICD-10-CM code for brain aneurysm is I67.1 (Cerebral aneurysm, nonruptured). The official index lists 13 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on I67.1.
Within I67 (other cerebrovascular diseases), I67.1 is specifically for cerebral aneurysm, nonruptured. Related codes cover dissection of cerebral arteries, nonruptured (I67.0), cerebral atherosclerosis (I67.2), progressive vascular leukoencephalopathy (I67.3), hypertensive encephalopathy (I67.4), Moyamoya disease (I67.5), nonpyogenic thrombosis of intracranial venous system (I67.6), cerebral arteritis, not elsewhere classified (I67.7), other specified cerebrovascular diseases (I67.8) and 1 more.
Don't report I67.1 together with the conditions in its Excludes1 note: congenital cerebral aneurysm, nonruptured (Q28.-) and ruptured cerebral aneurysm (I60.7).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
More specific brain aneurysm codes (official index)
- arteriosclerotic I67.1 — Cerebral aneurysm, nonruptured
- ruptured
- arteriovenous (congenital) (nonruptured) Q28.2 — Arteriovenous malformation of cerebral vessels
- acquired I67.1 — Cerebral aneurysm, nonruptured
- ruptured
- ruptured
- berry (congenital) (nonruptured) I67.1 — Cerebral aneurysm, nonruptured
- ruptured I60.7 — Nontraumatic subarachnoid hemorrhage from unspecified intracranial artery
- congenital Q28.3 — Other malformations of cerebral vessels
- ruptured I60.7 — Nontraumatic subarachnoid hemorrhage from unspecified intracranial artery
- meninges I67.1 — Cerebral aneurysm, nonruptured
- ruptured I60.8 — Other nontraumatic subarachnoid hemorrhage
- miliary (congenital) (nonruptured) I67.1 — Cerebral aneurysm, nonruptured
- ruptured I60.7 — Nontraumatic subarachnoid hemorrhage from unspecified intracranial artery
- mycotic I67.1 — Cerebral aneurysm, nonruptured
- with endocarditis
- ruptured
- syphilitic (hemorrhage) A52.05 — Other cerebrovascular syphilis
Don't confuse with (Excludes1 for I67.1)
Common questions about brain aneurysm ICD-10 codes
What is the ICD-10 code for brain aneurysm?
- I67.1 — Cerebral aneurysm, nonruptured. More specific codes apply when the documentation supports them: I67.1, Q28.2, I67.1, I67.1 and others below.
What is the ICD-10 code for arteriosclerotic brain aneurysm?
- I67.1 — Cerebral aneurysm, nonruptured.
What is the ICD-10 code for arteriovenous brain aneurysm?
- Q28.2 — Arteriovenous malformation of cerebral vessels.
What is the ICD-10 code for berry brain aneurysm?
- I67.1 — Cerebral aneurysm, nonruptured.
What is the ICD-10 code for congenital brain aneurysm?
- Q28.3 — Other malformations of cerebral vessels.
What is the ICD-10 code for meninges brain aneurysm?
- I67.1 — Cerebral aneurysm, nonruptured.
What is the ICD-10 code for miliary brain aneurysm?
- I67.1 — Cerebral aneurysm, nonruptured.
Is I67.1 billable?
- Yes. I67.1 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can I67.1 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict I67.1 as a principal diagnosis.
Is I67.1 a CC or MCC?
- No. I67.1 is neither a CC nor an MCC under MS-DRG v44.0.