2026 ICD-10-CM Diagnosis Code B37.41Candidal cystitis and urethritis

ICD-10-CM Codes›A00–B99›B35-B49›B37

ICD-10-CM B37.41
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

B37.41 is a billable ICD-10-CM diagnosis code for candidal cystitis and urethritis. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 727 through 728, 742 through 743, 757 through 759. Coders also document this condition as Candida ureteritis. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Fungal infections and Urinary tract infections.

Code Identity

ICD-10-CM Code
B37.41
Billable Status
Yes — Valid for Submission
Code Describes
Candidal cystitis and urethritis
Short Description
Candidal cystitis and urethritis
Same as the full description in the CMS dataset.
Parent Code
B37.4
Candidiasis of other urogenital sites

Code Classification

ChapterA00–B99Certain infectious and parasitic diseases
SectionB35-B49Mycoses
CategoryB37Candidiasis
This CodeB37.41Candidal cystitis and urethritis

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Candida ureteritis
  • Candidal urethritis
  • Infective ureteritis
  • Monilial cystitis
  • Renal tract candidiasis
  • Ureteritis

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.

    • Candidiasis, candidal
      • cystitis
    • Candidiasis, candidal
      • urethritis
    • Urethritis(anterior) (posterior)
      • candidal

Clinical ClassificationClinical

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

CCSR INF004
Fungal infections
Default principal diagnosis: inpatient No · outpatient No
CCSR GEN004
Urinary tract infections
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Ureteritis

    an acute or chronic inflammatory process affecting the ureter.

  • Ureteritis Cystica

    a non-neoplastic lesion of the ureter characterized by the presence of multiple submucosal small cysts in the ureteral wall. it is caused by inflammation due to urinary tract stones or infection.

  • Ureteritis Glandularis|Ureteritis glandularis

    a benign inflammatory lesion of the ureter characterized by glandular metaplasia of the urethral lining. it is a further proliferative progression of cystitis glandularis.

Patient EducationClinical

Urinary Tract Infections

The urinary system is the body's drainage system for removing wastes and extra water. It includes two kidneys, two ureters, a bladder, and a urethra. Urinary tract infections (UTIs) are the second most common type of infection in the body.

Read the full article at MedlinePlus

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

Convert B37.41 to ICD-9-CMHistory

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

ICD-9-CM
112.2 Candidias urogenital NEC
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 B37.41Overview

Is B37.41 (Candidiasis of other urogenital sites) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report candidal cystitis and urethritis on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does B37.41 group to?

When candidal cystitis and urethritis is the principal diagnosis on an inpatient stay, it groups to MS-DRG 727, 728, 742, 743, 757, 758, 759, with relative weights from 0.6636 to 1.8348 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of B37.41?

Under the General Equivalence Mappings, candidal cystitis and urethritis converts to ICD-9-CM 112.2 (candidias urogenital NEC). 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.