I25.89 vs I77.6
I25.89 (Other forms of chronic ischemic heart disease) 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 I25.89: “coronary (I25.89)”
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
| I25.89Other forms of chronic ischemic heart disease | 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 | Other forms of chronic ischemic heart disease is a billable ICD-10-CM diagnosis code (I25.89). | Arteritis, unspecified is a billable ICD-10-CM diagnosis code (I77.6). |
| Includes | — | Aortitis NOS Endarteritis NOS |
| Use additional code | code to identify: chronic total occlusion of coronary artery (I25.82) 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