2027 ICD-10-CM Diagnosis Code I67.841Reversible cerebrovascular vasoconstriction syndrome
ICD-10-CM Codes›I00–I99›I60-I69›I67
- Billable — Valid for Submission
- CC — Complication or Comorbidity
- Not Chronic
I67.841 is a billable ICD-10-CM diagnosis code for reversible cerebrovascular vasoconstriction syndrome. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 61 through 63, 69. As a secondary diagnosis, it counts as a complication or comorbidity (CC) and moves an inpatient stay to a higher severity level within its MS-DRG family. It does not count, however, when the principal diagnosis is one of 115 closely related codes. Coders also document this condition as cerebral vasoconstriction syndrome. 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.
- Cerebral vasoconstriction syndrome
- Headache due to reversible cerebral vasoconstriction syndrome
- Reversible cerebral vasoconstriction syndrome
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to I67.841: 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.
- Call-Fleming syndrome
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.-)
Code First
The underlying condition named in the note is sequenced before this code.
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Referenced in Other NotesGuidance
Instructional notes printed at other codes that name I67.841, its category, or a range that includes it.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
Syndrome See Also: Disease;
Call-Fleming I67.841
Vasospasm (vasoconstriction) See Also: Angiospasm; I73.9
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 I67.841 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About I67.841Overview
What is the ICD-10 code for reversible cerebrovascular vasoconstriction syndrome?
The ICD-10-CM code for reversible cerebrovascular vasoconstriction syndrome is I67.841 (sometimes written as I67841). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is I67.841 (Cerebral vasospasm and vasoconstriction) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report reversible cerebrovascular vasoconstriction syndrome on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does I67.841 group to?
When reversible cerebrovascular vasoconstriction syndrome is the principal diagnosis on an inpatient stay, it groups to MS-DRG 69, 61, 62, 63, with relative weights from 0.7962 to 2.7211 depending on complications. Higher weights mean higher Medicare reimbursement.
Is I67.841 a CC or MCC?
CMS lists I67.841 as a CC (complication or comorbidity) for FY 2027. Reported as a secondary diagnosis, it moves the inpatient stay to a higher-weighted DRG within its severity family. It does not count when the principal diagnosis is one of the 115 closely related codes in its exclusion list.
Can I67.841 be reported with a code from I63.2?
Not as a rule. The Excludes1 note at I67, which applies to I67.841, lists "Occlusion and stenosis of precerebral artery causing cerebral infarction (I63.2-)". 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).
