ICD-10-CM 2027
ICD-10 code for vaginal acute thrush
From the official ICD-10-CM alphabetic index entry “Thrush › vaginal (acute)”. Page updated September 29, 2026.
About coding vaginal acute thrush
The ICD-10-CM code for vaginal acute thrush is B37.31 (Acute candidiasis of vulva and vagina). The official index lists 1 more specific code, so check the documentation for details such as type, cause, site or severity before settling on B37.31.
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.
More specific vaginal acute thrush codes (official index)
- chronic (recurrent) B37.32 — Chronic candidiasis of vulva and vagina
Common questions about vaginal acute thrush ICD-10 codes
What is the ICD-10 code for vaginal acute thrush?
- B37.31 — Acute candidiasis of vulva and vagina. More specific codes apply when the documentation supports them: B37.32.
What is the ICD-10 code for chronic vaginal acute thrush?
- B37.32 — Chronic candidiasis of vulva and vagina.
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.