2026 ICD-10-CM Diagnosis Code I68.2Cerebral arteritis in other diseases classified elsewhere
ICD-10-CM Codes›I00–I99›I60-I69›I68
- Billable — Valid for Submission
- Chronic Condition
I68.2 is a billable ICD-10-CM diagnosis code for cerebral arteritis in other diseases classified elsewhere. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 102 through 103. The code is a manifestation code that cannot be reported as the principal diagnosis. Coders also document this condition as cerebral arteritis. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other and ill-defined cerebrovascular disease.
Code Identity
Code Classification
Code EditsBilling
Medicare Code Editor checks that affect claim validity for I68.2.
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Cerebral arteritis
- Cerebral arteritis due to infectious disease
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Code First
- underlying disease
Type 1 Excludes
- cerebral arteritis (in):
- listerosis A32.89
- systemic lupus erythematosus M32.19
- syphilis A52.04
- tuberculosis A18.89
Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions, the ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists, there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation.
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
Index to Diseases and InjuriesGuidance
External Cause of Injuries IndexGuidance
References for this code in the External Cause of Injuries Index.
- Arteritis
- cerebral
- in
- diseases classified elsewhere
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.
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Convert I68.2 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About I68.2Overview
Is I68.2 (Cerebrovascular disorders in diseases classified elsewhere) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report cerebral arteritis in other diseases classified elsewhere on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does I68.2 group to?
On inpatient claims, cerebral arteritis in other diseases classified elsewhere maps to MS-DRG 102, 103, with relative weights from 0.8363 to 1.1209 depending on complications. Higher weights mean higher Medicare reimbursement.
Can I68.2 be a principal diagnosis?
No. This is a manifestation code: cerebral arteritis in other diseases classified elsewhere describes the manifestation of an underlying disease rather than the disease itself, so the underlying condition is sequenced first.
What is the ICD-9 equivalent of I68.2?
Under the General Equivalence Mappings, cerebral arteritis in other diseases classified elsewhere converts to ICD-9-CM 437.4 (cerebral arteritis). The mapping is approximate, so confirm the match fits the documentation.
Footnotes
[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:
- The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
- The condition places limitations on self-care, independent living, and social interactions.
