2026 ICD-10-CM Diagnosis Code B37.31Acute candidiasis of vulva and vagina

ICD-10-CM Codes›A00–B99›B35-B49›B37

ICD-10-CM B37.31
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

B37.31 is a billable ICD-10-CM diagnosis code for acute candidiasis of vulva and vagina. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 757 through 759. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Fungal infections, Inflammatory diseases of female pelvic organs, and Other specified female genital disorders.

Code Identity

ICD-10-CM Code
B37.31
Billable Status
Yes — Valid for Submission
Code Describes
Acute candidiasis of vulva and vagina
Short Description
Acute candidiasis of vulva and vagina
Same as the full description in the CMS dataset.
Parent Code
B37.3
Candidiasis of vulva and vagina

Code Classification

ChapterA00–B99Certain infectious and parasitic diseases
SectionB35-B49Mycoses
CategoryB37Candidiasis
This CodeB37.31Acute candidiasis of vulva and vagina

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Acute candidal vulvovaginitis
  • Acute candidal vulvovaginitis in pregnancy
  • Acute candidiasis of vagina
  • Acute candidiasis of vagina in pregnancy
  • Acute candidiasis of vagina postpartum
  • Acute candidiasis of vulva
  • Candidal vulvovaginitis
  • Candidal vulvovaginitis during pregnancy
  • Candidiasis of vagina
  • Candidiasis of vagina in pregnancy
  • Candidiasis of vulva
  • Genital tract infection in puerperium
  • Infectious disease of mother complicating pregnancy
  • Postpartum candidiasis of vagina
  • Vaginitis in pregnancy

Tabular List NotesGuidance

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

Inclusion Terms

  • Candidiasis of vulva and vagina NOS

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
      • vagina (acute)
    • Candidiasis, candidal
      • vulva (acute)
    • Candidiasis, candidal
      • vulvovaginitis (acute)
    • Mycosis, mycotic
      • vagina, vaginitis (candidal) (acute)
    • Thrush
      • vaginal (acute)
    • Vaginitis(acute) (circumscribed) (diffuse) (emphysematous) (nonvenereal) (ulcerative)
      • candidal (acute)
    • Vaginitis(acute) (circumscribed) (diffuse) (emphysematous) (nonvenereal) (ulcerative)
      • in (due to)
        • candidiasis (acute)
    • Vaginitis(acute) (circumscribed) (diffuse) (emphysematous) (nonvenereal) (ulcerative)
      • monilial (acute)
    • Vaginitis(acute) (circumscribed) (diffuse) (emphysematous) (nonvenereal) (ulcerative)
      • mycotic (candidal) (acute)
    • Vulvitis(acute) (allergic) (atrophic) (hypertrophic) (intertriginous) (senile)
      • candidal (acute)
    • Vulvitis(acute) (allergic) (atrophic) (hypertrophic) (intertriginous) (senile)
      • monilial (acute)

Clinical ClassificationClinical

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

CCSR INF004
Fungal infections
Default principal diagnosis: inpatient No · outpatient No
CCSR GEN018
Inflammatory diseases of female pelvic organs
Default principal diagnosis: inpatient Yes · outpatient Yes
CCSR GEN025
Other specified female genital disorders
Default principal diagnosis: inpatient No · outpatient No

Patient EducationClinical

Vaginitis

Vaginitis, also called vulvovaginitis, is an inflammation or infection of the vagina. It can also affect the vulva, which is the external part of a woman's genitals. Vaginitis can cause itching, pain, discharge, and odor.

The full article covers:

  • What is vaginitis?
  • What causes vaginitis?
  • What are the symptoms of vaginitis?
  • How is the cause of vaginitis diagnosed?
  • What are the treatments for vaginitis?
  • Can vaginitis cause other health problems?
  • Can vaginitis be prevented?

Read the full article at MedlinePlus

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

Code History & ChangesHistory

Replacement B37.31 replaces the following previously assigned code(s):

  • B37.3 - Candidiasis of vulva and vagina
FY 2023AddedAdded to the ICD-10-CM code setEffective October 1, 2022.
FY 2024–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About B37.31Overview

Is B37.31 (Candidiasis of vulva and vagina) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report acute candidiasis of vulva and vagina on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does B37.31 group to?

When acute candidiasis of vulva and vagina is the principal diagnosis on an inpatient stay, it groups to MS-DRG 757, 758, 759, with relative weights from 0.6636 to 1.4319 depending on complications. Higher weights mean higher Medicare reimbursement.

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.