2027 ICD-10-CM Diagnosis Code I67.1Cerebral aneurysm, nonruptured
ICD-10-CM Codes›I00–I99›I60-I69›I67
- Billable — Valid for Submission
- Chronic Condition
I67.1 is a billable ICD-10-CM diagnosis code for cerebral aneurysm, nonruptured. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 91 through 93. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other and ill-defined cerebrovascular disease.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Acquired aneurysm of cerebral artery
- Acquired arteriovenous fistula
- Acquired arteriovenous fistula of dura of cerebrum
- Acquired caroticocavernous sinus fistula
- Aneurysm of anterior cerebral artery
- Aneurysm of anterior communicating artery
- Aneurysm of cerebral artery
- Aneurysm of extracranial portion of internal carotid artery
- Aneurysm of head and neck artery
- Aneurysm of internal carotid artery
- Aneurysm of internal carotid bifurcation
- Aneurysm of internal carotid-anterior communicating artery zone
- Aneurysm of internal carotid-posterior communicating artery zone
- Aneurysm of intracranial artery
- Aneurysm of intracranial portion of internal carotid artery
- Aneurysm of intracranial portion of left internal carotid artery
- Aneurysm of intracranial portion of right internal carotid artery
- Aneurysm of intracranial vein
- Aneurysm of left carotid artery
- Aneurysm of left internal carotid artery
- Aneurysm of middle cerebral artery
- Aneurysm of posterior cerebral artery
- Aneurysm of posterior communicating artery
- Aneurysm of posterior inferior cerebellar artery
- Aneurysm of right carotid artery
- Aneurysm of right internal carotid artery
- Aneurysm of the vein of Galen
- Aspergillus mycotic cerebral aneurysm
- Berry aneurysm
- Carotid cavernous fistula
- Cerebral aneurysm due to dissection of cerebral artery
- Dural arteriovenous fistula
- Familial cerebral saccular aneurysm
- Intracranial aneurysm
- Multiple aneurysms of cerebral artery
- Spontaneous caroticocavernous sinus fistula
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to I67.1: its own notes plus those printed at I67, block I60-I69, and Chapter 9. A note printed at a category, block or chapter applies to every code under it.
Applicable To
Conditions this code is used for: synonyms of the title or, for "other specified" codes, the conditions assigned to it. The list is not exhaustive.
- Cerebral aneurysm NOS
- Cerebral arteriovenous fistula, acquired
- Internal carotid artery aneurysm, intracranial portion
- Internal carotid artery aneurysm, NOS
Excludes1
Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.
- traumatic intracranial hemorrhage (S06.-)
Excludes2
Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.
- sequelae of the listed conditions (I69.8)
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
- systemic connective tissue disorders (M30-M36)
- transient cerebral ischemic attacks and related syndromes (G45.-)
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Referenced in Other NotesGuidance
Instructional notes printed at other codes that name I67.1, its category, or a range that includes it.
Excludes1 3
These codes carry an Excludes1 note naming I67.1: they are not reported together with it, unless the two conditions are unrelated.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
Aneurysm (anastomotic) (artery) (cirsoid) (diffuse) (false) (fusiform) (multiple) (saccular) I72.9
cerebral I67.1
arteriovenous (congenital) See Also: Malformation, arteriovenous;
brain I67.1
arteriosclerotic I67.1
arteriovenous (congenital) (nonruptured) Q28.2
acquired I67.1
meninges I67.1
mycotic I67.1
carotid artery (common) (external) I72.0
internal (intracranial) I67.1
cavernous sinus I67.1
circle of Willis I67.1
miliary (congenital) I67.1
arteriovenous (acquired) (nonruptured) I77.0
brain I67.1
arteriovenous (acquired) See Also: Fistula, arteriovenous, brain; I67.1
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Cerebral Aneurysm
a balloon type pouch or bulge in the wall of a cerebral blood vessel.
Patient EducationClinical
Brain Aneurysm
A brain aneurysm is an abnormal bulge or "ballooning" in the wall of an artery in the brain. They are sometimes called berry aneurysms because they are often the size of a small berry. Most brain aneurysms produce no symptoms until they become large, begin to leak blood, or burst.
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert I67.1 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About I67.1Overview
What is the ICD-10 code for cerebral aneurysm, nonruptured?
The ICD-10-CM code for cerebral aneurysm, nonruptured is I67.1 (sometimes written as I671). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is I67.1 (Other cerebrovascular diseases) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report cerebral aneurysm, nonruptured on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does I67.1 group to?
When cerebral aneurysm, nonruptured is the principal diagnosis on an inpatient stay, it groups to MS-DRG 91, 92, 93, with relative weights from 0.7783 to 1.7050 depending on complications. Higher weights mean higher Medicare reimbursement.
Can I67.1 be reported with a code from Q28?
Not as a rule. The Excludes1 note on I67.1 lists "congenital cerebral aneurysm, nonruptured (Q28.-)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).
What is the ICD-9 equivalent of I67.1?
Under the General Equivalence Mappings, cerebral aneurysm, nonruptured converts to ICD-9-CM 437.3 (nonrupt cerebral aneurym). The mapping is approximate, so confirm the match fits the documentation.
