2027 ICD-10-CM Diagnosis Code N30Cystitis

ICD-10-CM Codes›N00–N99›N30-N39›N30

ICD-10-CM N30
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

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

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to N30: its own notes plus those printed at block N30-N39 and Chapter 14. A note printed at a category, block or chapter applies to every code under it.

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From Block N30-N39 Other diseases of the urinary system applies to 85 codes
  • urinary infection (complicating):
  • abortion or ectopic or molar pregnancy (O00-O07, O08.8)
  • pregnancy, childbirth and the puerperium (O23.-, O75.3, O86.2-)
From Chapter 14 (N00-N99) Diseases of the genitourinary system applies to 838 codes
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)

Use Additional Code

Add a second code, after this one, to fully describe the condition.

  • code to identify infectious agent (B95-B97)

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name N30, its category, or a range that includes it.

Excludes1 1

These codes carry an Excludes1 note naming N30: they are not reported together with it, unless the two conditions are unrelated.

  • N39.0 Urinary tract infection, site not specified
    cystitis (N30.-)

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.

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 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About N30Overview

What is the ICD-10 code for cystitis?

N30 is the ICD-10-CM category for cystitis, but it is a non-billable header: claims need a more specific code from this category, listed on this page.

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.

Can N30 be reported with N41.3?

Not as a rule. The Excludes1 note on N30 lists "prostatocystitis (N41.3)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).

Does N30 need an additional code?

When the condition applies, yes. The Use Additional Code note reads: code to identify infectious agent (B95-B97). The additional code is reported after N30.