ICD-10-CM 2027 diagnosis code
B37.31Acute candidiasis of vulva and vagina
B37.31 is a valid, billable ICD-10-CM code for acute candidiasis of vulva and vagina. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.
Code last changed in FY2023 (effective October 1, 2022). Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data
About B37.31
B37.31 is the ICD-10-CM diagnosis code for acute candidiasis of vulva and vagina. It belongs to category B37 (candidiasis), block B35-B49 (mycoses) and chapter 1 (certain infectious and parasitic diseases). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.
Within B37.3 (candidiasis of vulva and vagina), B37.31 is specifically for acute candidiasis of vulva and vagina. Related codes cover chronic candidiasis of vulva and vagina (B37.32).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 757 (Infections, Female Reproductive System with MCC, relative weight 1.4649), DRG 758 (Infections, Female Reproductive System with CC, relative weight 0.9908) and DRG 759 (Infections, Female Reproductive System without CC/MCC, relative weight 0.7691), in MDC 13 (Diseases and Disorders of the Female Reproductive System), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
It is on the CMS list of diagnoses consistent only with female patients (the sex-conflict edit itself was retired in FY2025).
It was added in FY2023, effective October 1, 2022.
Coding notes
- Candidiasis of vulva and vagina NOS
Notes that apply from higher levels
Instructions written at a parent level also apply to B37.31.
› From B37 Candidiasis
- candidosis
- moniliasis
- neonatal candidiasis (P37.5)
Broader instructions also apply from B35-B49 Mycoses and Chapter 1: Certain infectious and parasitic diseases.
Alphabetic index entries
11 entriesTerms in the official ICD-10-CM index that lead to B37.31.
- 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)
MS-DRG v44.0 grouping
All DRGs →Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.
MDC 13 · Diseases and Disorders of the Female Reproductive System
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2023 (effective 10/1/2022): Added
- No changes since FY2023.
Common questions about B37.31
Is B37.31 billable?
- Yes. B37.31 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can B37.31 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict B37.31 as a principal diagnosis.
Is B37.31 a CC or MCC?
- No. B37.31 is neither a CC nor an MCC under MS-DRG v44.0.
What DRG does B37.31 group to?
- B37.31 is used in the MS-DRG v44.0 logic for MS-DRG 757 (Infections, Female Reproductive System with MCC), MS-DRG 758 (Infections, Female Reproductive System with CC) and MS-DRG 759 (Infections, Female Reproductive System without CC/MCC). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.