I68.2 vs M32.19
I68.2 (Cerebral arteritis in other diseases classified elsewhere) compared with M32.19 (Other organ or system involvement 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. I68.2 carries an Excludes1 note covering M32.19: “systemic lupus erythematosus (M32.19)”
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
| I68.2Cerebral arteritis in other diseases classified elsewhere | M32.19Other organ or system involvement 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 | Cerebral arteritis in other diseases classified elsewhere is a billable ICD-10-CM diagnosis code (I68.2). | Other organ or system involvement in systemic lupus erythematosus is a billable ICD-10-CM diagnosis code (M32.19). |
| Includes | — | autoimmune disease NOS collagen (vascular) disease NOS systemic autoimmune disease systemic collagen (vascular) disease |
| Use additional code | code to identify presence of: alcohol abuse and dependence (F10.-) exposure to environmental tobacco smoke (Z77.22) | code(s) to identify organ or system involvement, such as encephalitis (G05.3) |
| 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