I67.7 vs I77.6
I67.7 (Cerebral arteritis, not elsewhere classified) compared with I77.6 (Arteritis, unspecified), from the official CMS tabular data. Do not report these codes together: the official tabular list marks them Excludes1.
Can these codes be reported together?
No — do not report together. I77.6 carries an Excludes1 note covering I67.7: “cerebral NEC (I67.7)”
Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
Side by side
| I67.7Cerebral arteritis, not elsewhere classified | I77.6Arteritis, unspecified | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | I00-I99 — Diseases of the Circulatory System (I00-I99) | I00-I99 — Diseases of the Circulatory System (I00-I99) |
| Definition | Cerebral arteritis, not elsewhere classified is a billable ICD-10-CM diagnosis code (I67.7). | Arteritis, unspecified is a billable ICD-10-CM diagnosis code (I77.6). |
| Includes | Granulomatous angiitis of the nervous system | Aortitis NOS Endarteritis NOS |
| Use additional code | code to identify presence of: alcohol abuse and dependence (F10.-) exposure to environmental tobacco smoke (Z77.22) | — |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources