I22 vs I25.82
I22 (Subsequent ST elevation (STEMI) and non-ST elevation (NSTEMI) myocardial infarction) compared with I25.82 (Chronic total occlusion of coronary artery), 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. I25.82 carries an Excludes1 note covering I22: “acute coronary occlusion with myocardial infarction (I21.0-I21.B, I22.-)”
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
| I22Subsequent ST elevation (STEMI) and non-ST elevation (NSTEMI) myocardial infarction | I25.82Chronic total occlusion of coronary artery | |
|---|---|---|
| Billing status | Non-billable header | Billable |
| Classification | I00-I99 — Diseases of the Circulatory System (I00-I99) | I00-I99 — Diseases of the Circulatory System (I00-I99) |
| Definition | Subsequent ST elevation (STEMI) and non-ST elevation (NSTEMI) myocardial infarction is a non-billable ICD-10-CM category code (I22). | Chronic total occlusion of coronary artery is a billable ICD-10-CM diagnosis code (I25.82). |
| Includes | acute myocardial infarction occurring within four weeks (28 days) of a previous acute myocardial infarction, regardless of site cardiac infarction coronary (artery) embolism coronary (artery) occlusion | Complete occlusion of coronary artery Total occlusion of coronary artery |
| Use additional code | code, if applicable, to identify: exposure to environmental tobacco smoke (Z77.22) history of tobacco dependence (Z87.891) | code to identify: chronic total occlusion of coronary artery (I25.82) exposure to environmental tobacco smoke (Z77.22) |
| Code first | — | coronary atherosclerosis (I25.1-, I25.7-, I25.81-) |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources