I39 vs M32.11
I39 (Endocarditis and heart valve disorders in diseases classified elsewhere) compared with M32.11 (Endocarditis 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. I39 carries an Excludes1 note covering M32.11: “Libman-Sacks disease (M32.11)”
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
| I39Endocarditis and heart valve disorders in diseases classified elsewhere | M32.11Endocarditis 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 | Endocarditis and heart valve disorders in diseases classified elsewhere is a billable ICD-10-CM diagnosis code (I39). | Endocarditis in systemic lupus erythematosus is a billable ICD-10-CM diagnosis code (M32.11). |
| Includes | — | autoimmune disease NOS collagen (vascular) disease NOS systemic autoimmune disease systemic collagen (vascular) disease |
| Code first | underlying disease, such as: Q fever (A78) | — |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources