2026 ICD-10-CM Diagnosis Code N30.00Acute cystitis without hematuria

ICD-10-CM Codes›N00–N99›N30-N39›N30

ICD-10-CM N30.00
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

N30.00 is a billable ICD-10-CM diagnosis code for acute cystitis without hematuria. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 689 through 690. 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
N30.00
Billable Status
Yes — Valid for Submission
Code Describes
Acute cystitis without hematuria
Short Description
Acute cystitis without hematuria
Same as the full description in the CMS dataset.
Parent Code
N30.0
Acute cystitis

Code Classification

ChapterN00–N99Diseases of the genitourinary system
SectionN30-N39Other diseases of the urinary system
CategoryN30Cystitis
This CodeN30.00Acute cystitis without hematuria

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Acute bacterial simple cystitis
  • Acute culture positive cystitis
  • Acute cystitis
  • Acute cystitis - culture-negative
  • Acute infective cystitis
  • Acute lower urinary tract infection
  • Acute on chronic cystitis
  • Acute recurrent cystitis
  • Recurrent cystitis

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Cystitis(exudative) (hemorrhagic) (septic) (suppurative)
      • acute

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

  • Acute Cystitis

    an acute infection of the bladder. it is usually caused by bacteria. signs and symptoms include increased frequency of urination, pain or burning during urination, fever, cloudy or bloody urine, 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 N30.00 to ICD-9-CMHistory

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

ICD-9-CM
595.0 Acute cystitis
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 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About N30.00Overview

Is N30.00 (Acute cystitis) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report acute cystitis without hematuria on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does N30.00 group to?

When acute cystitis without hematuria is the principal diagnosis on an inpatient stay, it groups to MS-DRG 689, 690, with relative weights from 0.8095 to 1.1603 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of N30.00?

Under the General Equivalence Mappings, acute cystitis without hematuria converts to ICD-9-CM 595.0 (acute cystitis). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.