2027 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 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

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 2027 (October 1, 2026 through September 30, 2027) 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 during pregnancy
  • Candidiasis of vulva
  • Genital tract infection in puerperium
  • Infectious disease of mother complicating pregnancy
  • Postpartum candidiasis of vagina
  • Vaginitis in pregnancy

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to B37.31: its own notes plus those printed at B37, block B35-B49, and Chapter 1. A note printed at a category, block or chapter applies to every code under it.

Includes

Further defines, or gives examples of, the content of the category.

From B37 Candidiasis applies to 17 codes
  • candidosis
  • moniliasis
From Chapter 1 (A00-B99) Certain infectious and parasitic diseases applies to 1,068 codes
  • diseases generally recognized as communicable or transmissible

Applicable To

Conditions this code is used for: synonyms of the title or, for "other specified" codes, the conditions assigned to it. The list is not exhaustive.

  • Candidiasis of vulva and vagina NOS

Excludes1

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

From B37 Candidiasis applies to 17 codes
  • neonatal candidiasis (P37.5)

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 B35-B49 Mycoses applies to 104 codes
  • hypersensitivity pneumonitis due to organic dust (J67.-)
  • mycosis fungoides (C84.0-)
From Chapter 1 (A00-B99) Certain infectious and parasitic diseases applies to 1,068 codes
  • carrier or suspected carrier of infectious disease (Z22.-)
  • certain localized infections - see body system-related chapters
  • infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-)
  • infectious and parasitic diseases specific to the perinatal period (P35-P39)
  • influenza and other acute respiratory infections (J00-J22)

Use Additional Code

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

From Chapter 1 (A00-B99) Certain infectious and parasitic diseases applies to 1,068 codes
  • code to identify resistance to antimicrobial drugs (Z16.-)

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

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name B37.31, its category, or a range that includes it.

Excludes1 1

These codes carry an Excludes1 note naming B37.31: they are not reported together with it, unless the two conditions are unrelated.

  • N77.1 Vaginitis, vulvitis and vulvovaginitis in diseases classified elsewhere
    candidal vulvovaginitis (B37.3-) names B37.3-, 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 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

Clinical InformationClinical

  • Candidiasis

    infection with a fungus of the genus candida. it is usually a superficial infection of the moist areas of the body and is generally caused by candida albicans. (dorland, 27th ed)

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 2024–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About B37.31Overview

What is the ICD-10 code for acute candidiasis of vulva and vagina?

The ICD-10-CM code for acute candidiasis of vulva and vagina is B37.31 (sometimes written as B3731). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

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, 2026 through September 30, 2027.

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 759, 758, 757, with relative weights from 0.7687 to 1.4643 depending on complications. Higher weights mean higher Medicare reimbursement.

Can B37.31 be reported with P37.5?

Not as a rule. The Excludes1 note at B37, which applies to B37.31, lists "neonatal candidiasis (P37.5)". 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).