2026 ICD-10-CM Diagnosis Code N90.9Noninflammatory disorder of vulva and perineum, unspecified

ICD-10-CM Codes›N00–N99›N80-N98›N90

ICD-10-CM N90.9
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

N90.9 is a billable ICD-10-CM diagnosis code for noninflammatory disorder of vulva and perineum, unspecified. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 742 through 743, 760 through 761. Coders also document this condition as disorder of prepuce of clitoris. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified female genital disorders.

Code Identity

ICD-10-CM Code
N90.9
Billable Status
Yes — Valid for Submission
Code Describes
Noninflammatory disorder of vulva and perineum, unspecified
Short Description
Noninflammatory disorder of vulva and perineum, unspecified
Same as the full description in the CMS dataset.
Parent Code
N90
Other noninflammatory disorders of vulva and perineum

Code Classification

ChapterN00–N99Diseases of the genitourinary system
SectionN80-N98Noninflammatory disorders of female genital tract
CategoryN90Other noninflammatory disorders of vulva and perineum
This CodeN90.9Noninflammatory disorder of vulva and perineum, unspecified

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Disorder of prepuce of clitoris
  • Disorder of skin of vulva
  • Disorder of vulva
  • Disorder of vulva in pregnancy, childbirth, and/or puerperium
  • Lesion of labia
  • Noninflammatory disorder of vulva
  • Vulva problem
  • Vulval and/or perineal noninflammatory disorders
  • Vulvovaginal disease

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.

    • Disease, diseased
      • vulva (noninflammatory)

Clinical ClassificationClinical

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

CCSR GEN025
Other specified female genital disorders
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Vulvar Disorders

The vulva is the external part of a woman's genitals. Some problems you can have with the vulvar area include:

Read the full article at MedlinePlus

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

Convert N90.9 to ICD-9-CMHistory

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

ICD-9-CM
624.9 Noninflam dis vulva NOS
Exact Match The mapping is direct, with no qualifiers.

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 N90.9Overview

Is N90.9 (Other noninflammatory disorders of vulva and perineum) a billable code?

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

What MS-DRG does N90.9 group to?

When noninflammatory disorder of vulva and perineum, unspecified is the principal diagnosis on an inpatient stay, it groups to MS-DRG 742, 743, 760, 761, with relative weights from 0.5696 to 1.8348 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of N90.9?

Under the General Equivalence Mappings, noninflammatory disorder of vulva and perineum, unspecified converts to ICD-9-CM 624.9 (noninflam dis vulva NOS). The mapping is a direct match.

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.