I32 vs M32.12
I32 (Pericarditis in diseases classified elsewhere) compared with M32.12 (Pericarditis in systemic lupus erythematosus), 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. I32 carries an Excludes1 note covering M32.12: “systemic lupus erythematosus (M32.12)”
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
| I32Pericarditis in diseases classified elsewhere | M32.12Pericarditis in systemic lupus erythematosus | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | I00-I99 — Diseases of the Circulatory System (I00-I99) | M00-M99 — Diseases of the Musculoskeletal System and Connective Tissue (M00-M99) |
| Definition | Pericarditis in diseases classified elsewhere is a billable ICD-10-CM diagnosis code (I32). | Pericarditis in systemic lupus erythematosus is a billable ICD-10-CM diagnosis code (M32.12). |
| Includes | — | autoimmune disease NOS collagen (vascular) disease NOS systemic autoimmune disease systemic collagen (vascular) disease |
| Code first | underlying disease | — |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources