2027 ICD-10-CM Diagnosis Code I67.0Dissection of cerebral arteries, nonruptured
ICD-10-CM Codes›I00–I99›I60-I69›I67
- Billable — Valid for Submission
- MCC — Major Complication or Comorbidity
- Chronic Condition
I67.0 is a billable ICD-10-CM diagnosis code for dissection of cerebral arteries, nonruptured. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 299 through 301. As a secondary diagnosis, it counts as a major complication or comorbidity (MCC) and places an inpatient stay in the highest severity level of its MS-DRG family. It does not count, however, when the principal diagnosis is one of 10 closely related codes. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Arterial dissections.
I67.0 no longer risk-adjusts for Medicare Advantage: it mapped to HCC 107 under the retired CMS-HCC V24 model through payment year 2025 but maps to no category in the live V28 model. It still risk-adjusts in the PACE (CMS-HCC V22) category 107, ESRD (V21) category 107, and ESRD (V24) category 107 for payment year 2027.
Code Identity
Code Classification
Medicare Risk Adjustment (HCC)Billing
I67.0 no longer risk-adjusts for Medicare Advantage: it maps to no payment category in the live CMS-HCC V28 model, although it still risk-adjusts in the other CMS models shown below.
Source: CMS Payment Year 2027 risk adjustment mappings and model software. Weights are relative factors, not dollar amounts; a beneficiary's total RAF also includes demographics and interactions. Browse all CMS-HCC categories.
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Aneurysm of anterior cerebral artery
- Aneurysm of middle cerebral artery
- Aneurysm of posterior cerebral artery
- Cerebral aneurysm due to dissection of cerebral artery
- Dissecting aneurysm of anterior cerebral artery
- Dissecting aneurysm of middle cerebral artery
- Dissecting aneurysm of posterior cerebral artery
- Dissection of anterior cerebral artery
- Dissection of cerebral artery
- Dissection of intracranial artery
- Dissection of middle cerebral artery
- Dissection of multiple cerebral arteries
- Dissection of posterior cerebral artery
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to I67.0: 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.
Excludes1
Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.
- ruptured cerebral arteries (I60.7)
- 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.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Patient EducationClinical
Brain Diseases
Your brain is the control center of your body. It controls your thoughts, memory, speech, and movement. It regulates the function of many organs. It's part of your nervous system, which also includes your spinal cord and peripheral nerves. The nervous system sends signals between your brain and the rest of the body.
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert I67.0 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About I67.0Overview
What is the ICD-10 code for dissection of cerebral arteries, nonruptured?
The ICD-10-CM code for dissection of cerebral arteries, nonruptured is I67.0 (sometimes written as I670). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is I67.0 (Other cerebrovascular diseases) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report dissection of cerebral arteries, nonruptured on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does I67.0 group to?
When dissection of cerebral arteries, nonruptured is the principal diagnosis on an inpatient stay, it groups to MS-DRG 301, 300, 299, with relative weights from 0.7132 to 1.5840 depending on complications. Higher weights mean higher Medicare reimbursement.
Is I67.0 a CC or MCC?
CMS lists I67.0 as an MCC (major complication or comorbidity) for FY 2027. Reported as a secondary diagnosis, it places the inpatient stay in the highest-weighted DRG of its severity family. It does not count when the principal diagnosis is one of the 10 closely related codes in its exclusion list.
Can I67.0 be reported with I60.7?
Not as a rule. The Excludes1 note on I67.0 lists "ruptured cerebral arteries (I60.7)". 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).
Does I67.0 risk-adjust for Medicare Advantage payment?
Not for Medicare Advantage. I67.0 mapped to HCC 107 in the retired CMS-HCC V24 model, which last determined payment in 2025, but it maps to no category in the live V28 model; see all codes that no longer risk-adjust. It still risk-adjusts in the PACE (CMS-HCC V22) category 107 (Vascular Disease with Complications), ESRD (V21) category 107 (Vascular Disease with Complications), and ESRD (V24) category 107 (Vascular Disease with Complications).
