2026 ICD-10-CM Diagnosis Code N30Cystitis

ICD-10-CM Codes›N00–N99›N30-N39›N30

ICD-10-CM N30
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

N30 is a non-billable ICD-10-CM category code for cystitis, so it cannot be submitted on claims. Use a more specific code from this category instead, such as N30.00, N30.01, N30.10, and N30.11.

Code Identity

ICD-10-CM Code
N30
Billable Status
No — Non-Billable Category
Code Describes
Cystitis
Short Description
Cystitis
Same as the full description in the CMS dataset.
Chapter
N30-N39
Other diseases of the urinary system

Code Classification

ChapterN00–N99Diseases of the genitourinary system
SectionN30-N39Other diseases of the urinary system
CategoryN30Cystitis
This CodeN30Cystitis

Specific Coding for CystitisOverview

Non-specific codes like N30 require more characters. Use one of these billable codes instead:

  • N30.0 for Acute cystitis

  • Use N30.00 for Acute cystitis without hematuria

  • Use N30.01 for Acute cystitis with hematuria

  • N30.1 for Interstitial cystitis (chronic)

  • Use N30.10 for Interstitial cystitis (chronic) without hematuria

  • Use N30.11 for Interstitial cystitis (chronic) with hematuria

  • N30.2 for Other chronic cystitis

  • Use N30.20 for Other chronic cystitis without hematuria

  • Use N30.21 for Other chronic cystitis with hematuria

  • N30.3 for Trigonitis

  • Use N30.30 for Trigonitis without hematuria

  • Use N30.31 for Trigonitis with hematuria

  • N30.4 for Irradiation cystitis

  • Use N30.40 for Irradiation cystitis without hematuria

  • Use N30.41 for Irradiation cystitis with hematuria

  • N30.8 for Other cystitis

  • Use N30.80 for Other cystitis without hematuria

  • Use N30.81 for Other cystitis with hematuria

  • N30.9 for Cystitis, unspecified

  • Use N30.90 for Cystitis, unspecified without hematuria

  • Use N30.91 for Cystitis, unspecified with hematuria

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Use Additional Code

  • code to identify infectious agent B95 B97

Type 1 Excludes

Clinical InformationClinical

  • Cystitis

    inflammation of the urinary bladder, either from bacterial or non-bacterial causes. cystitis is usually associated with painful urination (dysuria), increased frequency, urgency, and suprapubic pain.

  • Cystitis, Hemorrhagic

    a diffuse inflammation of the urinary bladder characterized by hematuria due to bleeding from the bladder mucosa. hemorrhagic cystitis is most often associated with infections, e.g., human adenovirus infecions, but may also be due to other noninfectious etiologies: chemotherapy with certain drugs, e.g., cyclophosphamide and ifosfamide, and radiotherapy.

  • Cystitis, Interstitial

    a condition with recurring discomfort or pain in the urinary bladder and the surrounding pelvic region without an identifiable disease. severity of pain in interstitial cystitis varies greatly and often is accompanied by increased urination frequency and urgency.

  • Urinary Bladder

    a musculomembranous sac along the urinary tract. urine flows from the kidneys into the bladder via the ureters (ureter), and is held there until urination.

Patient EducationClinical

Bladder Diseases

The bladder is a hollow organ in your lower abdomen that stores urine. Many conditions can affect your bladder. Some common ones are:

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About N30Overview

Is N30 (Cystitis) a billable code?

No. This is a category header that groups the codes for cystitis, and headers cannot be submitted on claims. Claims for cystitis need a more specific code from this category, such as N30.00, N30.01, and N30.10.