I31 vs I97.0
I31 (Other diseases of pericardium) compared with I97.0 (Postcardiotomy syndrome), 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. I31 carries an Excludes1 note covering I97.0: “postcardiotomy syndrome (I97.0)”
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
| I31Other diseases of pericardium | I97.0Postcardiotomy syndrome | |
|---|---|---|
| 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 | Other diseases of pericardium is a non-billable ICD-10-CM category code (I31). | Postcardiotomy syndrome is a billable ICD-10-CM diagnosis code (I97.0). |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources