I20 vs I23.7
I20 (Angina pectoris) compared with I23.7 (Postinfarction angina), 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. I20 carries an Excludes1 note covering I23.7: “postinfarction angina (I23.7)”
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
| I20Angina pectoris | I23.7Postinfarction angina | |
|---|---|---|
| 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 | Angina pectoris is a non-billable ICD-10-CM category code (I20). | Postinfarction angina is a billable ICD-10-CM diagnosis code (I23.7). |
| Use additional code | code to identify: exposure to environmental tobacco smoke (Z77.22) history of tobacco dependence (Z87.891) | — |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources