N30.0 vs N30.3
N30.0 (Acute cystitis) compared with N30.3 (Trigonitis), 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. N30.0 carries an Excludes1 note covering N30.3: “trigonitis (N30.3-)”
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
| N30.0Acute cystitis | N30.3Trigonitis | |
|---|---|---|
| Billing status | Non-billable header | Non-billable header |
| Classification | N00-N99 — Diseases of the Genitourinary System (N00-N99) | N00-N99 — Diseases of the Genitourinary System (N00-N99) |
| Definition | Acute cystitis is a non-billable ICD-10-CM category code (N30.0). | Trigonitis is a non-billable ICD-10-CM category code (N30.3). |
| Includes | — | Urethrotrigonitis |
| Use additional code | code to identify infectious agent (B95-B97) | code to identify infectious agent (B95-B97) |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources