2027 ICD-10-CM Diagnosis Code N30.90Cystitis, unspecified without hematuria

ICD-10-CM Codes›N00–N99›N30-N39›N30

ICD-10-CM N30.90
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

N30.90 is a billable ICD-10-CM diagnosis code for cystitis, unspecified without hematuria. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 689 through 690, 791, 793. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Urinary tract infections.

This medical diagnosis code is frequently used in Family Practice, Internal Medicine, OB/GYN, and Pediatrics medical specialties to designate conditions such urinary tract infection, cystitis.

Code Identity

ICD-10-CM Code
N30.90
Billable Status
Yes — Valid for Submission
Code Describes
Cystitis, unspecified without hematuria
Short Description
Cystitis, unspecified without hematuria
Same as the full description in the CMS dataset.
Parent Code
N30.9
Cystitis, unspecified

Code Classification

ChapterN00–N99Diseases of the genitourinary system
SectionN30-N39Other diseases of the urinary system
CategoryN30Cystitis
This CodeN30.90Cystitis, unspecified without hematuria

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Bacterial cystitis
  • Coliform urinary tract infection
  • Cystitis
  • Cystitis with bilharziasis
  • Cystitis with Echinococcus infestation
  • Disorder of urinary bladder caused by Schistosoma
  • Infective cystitis
  • Klebsiella cystitis
  • Recurrent cystitis
  • Urinary schistosomiasis
  • Urinary tract infection caused by Klebsiella
  • Viral cystitis

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to N30.90: its own notes plus those printed at N30, 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.

From N30 Cystitis applies to 14 codes

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.

From N30 Cystitis applies to 14 codes
  • 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 N30.90, its category, or a range that includes it.

Excludes1 1

These codes carry an Excludes1 note naming N30.90: they are not reported together with it, unless the two conditions are unrelated.

  • N39.0 Urinary tract infection, site not specified
    cystitis (N30.-) names N30.-, which includes this code

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR GEN004
Urinary tract infections
Default principal diagnosis: inpatient Yes · outpatient Yes

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.

Convert N30.90 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
595.9 Cystitis NOS
Approximate The match is approximate rather than exact.

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 N30.90Overview

What is the ICD-10 code for cystitis, unspecified without hematuria?

The ICD-10-CM code for cystitis, unspecified without hematuria is N30.90 (sometimes written as N3090). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is N30.90 (Cystitis, unspecified) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report cystitis, unspecified without hematuria on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does N30.90 group to?

When cystitis, unspecified without hematuria is the principal diagnosis on an inpatient stay, it groups to MS-DRG 793, 791, 689, 690, with relative weights from 0.8008 to 4.2192 depending on complications. Higher weights mean higher Medicare reimbursement.

Can N30.90 be reported with N41.3?

Not as a rule. The Excludes1 note at N30, which applies to N30.90, 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 N30.90 need an additional code?

When the condition applies, yes. The Use Additional Code note at N30, which applies to N30.90, reads: code to identify infectious agent (B95-B97). The additional code is reported after N30.90.