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N30 ICD-10-CA category: Cystitis

N30 isn’t a code on its own. Choose one of the 7 codes beneath it, the one the documentation supports.

Official description

N30

Cystitis

ICD-10-CA · Canada

Codes in N30

N30 isn’t a code on its own. Open the code that matches what the note documents.

N30.0Acute cystitisN30.1Interstitial cystitis (chronic)N30.2Other chronic cystitisN30.3TrigonitisN30.4Irradiation cystitisN30.8Other cystitisN30.9Cystitis, unspecified

Notes for N30

As CIHI prints them, with any note N30 takes from the headings above it.

Use additional code

Add a code for this detail when the note documents it.

  • Use additional code to identify infectious agent (B95-B97) or responsible external agent (Chapter XX).

Excludes

Conditions classified elsewhere.

  • Prostatocystitis (N41.3)
  • Urinary infection (complicating):• abortion or ectopic or molar pregnancy (O00-O07, O08.8)• pregnancy, childbirth and the puerperium (O23.-)(O75.3) (O86.2)• with urolithiasis (N20-N23)From N30-N39 Other diseases of urinary system
  • Certain conditions originating in the perinatal period (P00-P96)certain infectious and parasitic diseases (A00-B99)complications of pregnancy, childbirth and the puerperium (O00-O99)congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)endocrine, nutritional and metabolic diseases (E00-E90)injury, poisoning and certain other consequences of external causes (S00-T98)neoplasms (C00-D48)symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)From Chapter 14: Diseases of the genitourinary system (N00-N99)

Where N30 sits

  1. 1ChapterChapter 14: Diseases of the genitourinary system (N00-N99)
  2. 2Block N30-N39Other diseases of urinary system
  3. 3Category N30Cystitis

Source and release

Data release
ICD-10-CA · FY 2026–2027
Effective date
Apr 1, 2026
Publisher
CIHI

This page is built from the ICD-10-CA catalog that Vero Codes reads when it suggests codes: Canadian Institute for Health Information’s FY 2026–2027 release, imported from the publisher’s file and checked against it. The description, notes and structured data come from the same record.

See N30 in the CIHI source

Frequently asked questions

Is N30 a valid ICD-10-CA code?

No. N30 (Cystitis) is a category heading in CIHI’s ICD-10-CA FY 2026–2027 release. It holds 7 codes; record the one the documentation supports.

Where is N30 in ICD-10-CA?

N30 sits under N30-N39 Other diseases of urinary system, within Chapter 14: Diseases of the genitourinary system (N00-N99).

What coding notes apply to N30?

ICD-10-CA lists Use additional code, Excludes notes for N30, including those from the headings it sits under. They are listed on this page with where each one comes from.

Which ICD-10-CA release does this page use?

It uses CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026 to Mar 31, 2027. It is a reference: confirm the code against the current list and the payer’s rules before you submit it.

Codes beside N30

N31Neuromuscular dysfunction of bladder, not elsewhere classifiedN32Other disorders of bladderN33Bladder disorders in diseases classified elsewhereN34Urethritis and urethral syndromeN35Urethral strictureN36Other disorders of urethraN37Urethral disorders in diseases classified elsewhereN39Other disorders of urinary system