| N30 | Cystitis | NON-BILLABLE CODE |
| N30.0 | Acute cystitis | NON-BILLABLE CODE |
| N30.01 | Acute cystitis with hematuria | BILLABLE CODE |
| N30.1 | Interstitial cystitis (chronic) | NON-BILLABLE CODE |
| N30.10 | Interstitial cystitis (chronic) without hematuria | BILLABLE CODE |
| N30.11 | Interstitial cystitis (chronic) with hematuria | BILLABLE CODE |
| N30.2 | Other chronic cystitis | NON-BILLABLE CODE |
| N30.20 | Other chronic cystitis without hematuria | BILLABLE CODE |
| N30.21 | Other chronic cystitis with hematuria | BILLABLE CODE |
| N30.3 | Trigonitis | NON-BILLABLE CODE |
| N30.30 | Trigonitis without hematuria | BILLABLE CODE |
| N30.31 | Trigonitis with hematuria | BILLABLE CODE |
| N30.4 | Irradiation cystitis | NON-BILLABLE CODE |
| N30.40 | Irradiation cystitis without hematuria | BILLABLE CODE |
| N30.41 | Irradiation cystitis with hematuria | BILLABLE CODE |
| N30.8 | Other cystitis | NON-BILLABLE CODE |
| N30.80 | Other cystitis without hematuria | BILLABLE CODE |
| N30.81 | Other cystitis with hematuria | BILLABLE CODE |
| N30.9 | Cystitis, unspecified | NON-BILLABLE CODE |
| N30.90 | Cystitis, unspecified without hematuria | BILLABLE CODE |
| N30.91 | Cystitis, unspecified with hematuria | BILLABLE CODE |
