N30 Cystitis

Category / Non-billable header 21 subcodes

Block: Other diseases of the urinary system (N30-N39)

Excludes 1 (cannot be coded together)

  • prostatocystitis (N41.3)

Use Additional Code

  • code to identify infectious agent (B95-B97)

Subcodes

Subcodes are listed below for reference. Detail pages are not available for chapters 11–22.

Code Description Billable
N30..0 Acute cystitis No
N30..00 Acute cystitis without hematuria Yes
N30..01 Acute cystitis with hematuria Yes
N30..1 Interstitial cystitis (chronic) No
N30..10 Interstitial cystitis (chronic) without hematuria Yes
N30..11 Interstitial cystitis (chronic) with hematuria Yes
N30..2 Other chronic cystitis No
N30..20 Other chronic cystitis without hematuria Yes
N30..21 Other chronic cystitis with hematuria Yes
N30..3 Trigonitis No
N30..30 Trigonitis without hematuria Yes
N30..31 Trigonitis with hematuria Yes
N30..4 Irradiation cystitis No
N30..40 Irradiation cystitis without hematuria Yes
N30..41 Irradiation cystitis with hematuria Yes
N30..8 Other cystitis No
N30..80 Other cystitis without hematuria Yes
N30..81 Other cystitis with hematuria Yes
N30..9 Cystitis, unspecified No
N30..90 Cystitis, unspecified without hematuria Yes
N30..91 Cystitis, unspecified with hematuria Yes

Last reviewed: September 2026