ICD-10 Code for Cystitis
Also indexed as (exudative) (hemorrhagic) (septic) (suppurative)
The ICD-10-CM code for cystitis is N30.90 — Cystitis, unspecified without hematuria. This is the code the Alphabetic Index gives for cystitis with no further qualifier, valid for FY2027 (October 1, 2026 – September 30, 2027).
N30.90 is billable but unspecified. If the documentation names a type, site or cause, one of the more specific codes below is likely expected.
Which cystitis code should you use?
The Alphabetic Index lists 28 codes under Cystitis. Which one applies depends on the qualifier documented in the record — the type, site, cause, or associated condition. Find the qualifier below, then verify the code in the Tabular List before using it.
By type
| acute | N30.00 | Acute cystitis without hematuria | |
| amebic | A06.81 | Amebic cystitis | |
| bilharzial | B65.9 | Schistosomiasis, unspecified | |
| blennorrhagic | A54.01 | Gonococcal cystitis and urethritis, unspecified | |
| calculous | N21.0 | Calculus in bladder | |
| chlamydial | A56.01 | Chlamydial cystitis and urethritis | |
| chronic | N30.20 | Other chronic cystitis without hematuria | |
| diphtheritic | A36.85 | Diphtheritic cystitis | |
| gonococcal | A54.01 | Gonococcal cystitis and urethritis, unspecified | |
| irradiation | N30.40 | Irradiation cystitis without hematuria | |
| of trigone | N30.30 | Trigonitis without hematuria | |
| prostatic | N41.3 | Prostatocystitis | |
| puerperal | O86.22 | Infection of bladder following delivery | |
| specified type NEC | N30.80 | Other cystitis without hematuria | |
| syphilitic | A52.76 | Other genitourinary symptomatic late syphilis | |
| trichomonal | A59.03 | Trichomonal cystitis and urethritis | |
| tuberculous | A18.12 | Tuberculosis of bladder |
Cystitis acute
Cystitis chronic
| with hematuria | N30.21 | Other chronic cystitis with hematuria | |
| interstitial | N30.10 | Interstitial cystitis (chronic) without hematuria | |
| of trigone | N30.30 | Trigonitis without hematuria | |
| specified NEC | N30.20 | Other chronic cystitis without hematuria | |
| interstitial › with hematuria | N30.11 | Interstitial cystitis (chronic) with hematuria | |
| of trigone › with hematuria | N30.31 | Trigonitis with hematuria | |
| specified NEC › with hematuria | N30.21 | Other chronic cystitis with hematuria |
Cystitis echinococcal
Cystitis irradiation
| with hematuria | N30.41 | Irradiation cystitis with hematuria |
Cystitis of trigone
| with hematuria | N30.31 | Trigonitis with hematuria |
Cystitis specified type NEC
| with hematuria | N30.81 | Other cystitis with hematuria |
Index terms and codes are reproduced from the official ICD-10-CM FY2027 release. The Alphabetic Index is a finding aid — a code must always be verified in the Tabular List before it is reported. Data sources