N30: Cystitis
Codes under N30 (Cystitis). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.
| Code | Description | Billable |
|---|---|---|
| N30.0 | Acute cystitis | — |
| N30.0 | Acute cystitis | — |
| N30.00 | Acute cystitis without hematuria | ✓ |
| N30.00 | Acute cystitis without hematuria | ✓ |
| N30.01 | Acute cystitis with hematuria | ✓ |
| N30.01 | Acute cystitis with hematuria | ✓ |
| N30.1 | Interstitial cystitis (chronic) | — |
| N30.1 | Interstitial cystitis (chronic) | — |
| N30.2 | Other chronic cystitis | — |
| N30.2 | Other chronic cystitis | — |
| N30.3 | Trigonitis | — |
| N30.3 | Trigonitis | — |
| N30.4 | Irradiation cystitis | — |
| N30.4 | Irradiation cystitis | — |
| N30.8 | Other cystitis | — |
| N30.8 | Other cystitis | — |
| N30.9 | Cystitis, unspecified | — |
| N30.9 | Cystitis, unspecified | — |
| N30.10 | Interstitial cystitis (chronic) without hematuria | ✓ |
| N30.10 | Interstitial cystitis (chronic) without hematuria | ✓ |
| N30.11 | Interstitial cystitis (chronic) with hematuria | ✓ |
| N30.11 | Interstitial cystitis (chronic) with hematuria | ✓ |
| N30.20 | Other chronic cystitis without hematuria | ✓ |
| N30.20 | Other chronic cystitis without hematuria | ✓ |
| N30.21 | Other chronic cystitis with hematuria | ✓ |
| N30.21 | Other chronic cystitis with hematuria | ✓ |
| N30.30 | Trigonitis without hematuria | ✓ |
| N30.30 | Trigonitis without hematuria | ✓ |
| N30.31 | Trigonitis with hematuria | ✓ |
| N30.31 | Trigonitis with hematuria | ✓ |
| N30.40 | Irradiation cystitis without hematuria | ✓ |
| N30.40 | Irradiation cystitis without hematuria | ✓ |
| N30.41 | Irradiation cystitis with hematuria | ✓ |
| N30.41 | Irradiation cystitis with hematuria | ✓ |
| N30.80 | Other cystitis without hematuria | ✓ |
| N30.80 | Other cystitis without hematuria | ✓ |
| N30.81 | Other cystitis with hematuria | ✓ |
| N30.81 | Other cystitis with hematuria | ✓ |
| N30.90 | Cystitis, unspecified without hematuria | ✓ |
| N30.90 | Cystitis, unspecified without hematuria | ✓ |
| N30.91 | Cystitis, unspecified with hematuria | ✓ |
| N30.91 | Cystitis, unspecified with hematuria | ✓ |
Frequently asked questions
What is ICD-10-CM code N30?
N30 is an ICD-10-CM category covering Cystitis. It contains 42 more specific diagnosis codes, 28 of which are billable.
Is N30 a billable code?
No — N30 is a category header and isn't billable on its own. Code to the highest level of specificity using one of its subcodes (for example N30.0 — Acute cystitis). 28 of the 42 codes under N30 are billable.
What codes fall under N30?
N30 includes N30.0, N30.0, N30.00, N30.00, N30.01, plus 37 more. See the full list with descriptions and billable status above.
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Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.
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