2026 ICD-10-CM Diagnosis Code N92.6Irregular menstruation, unspecified

ICD-10-CM Codes›N00–N99›N80-N98›N92

ICD-10-CM N92.6
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

N92.6 is a billable ICD-10-CM diagnosis code for irregular menstruation, 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 abnormal menstrual cycle. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Menstrual disorders.

This medical diagnosis code is frequently used in OB/GYN medical specialties to designate conditions such excessive, frequent and irregular menstruation.

Code Identity

ICD-10-CM Code
N92.6
Billable Status
Yes — Valid for Submission
Code Describes
Irregular menstruation, unspecified
Short Description
Irregular menstruation, unspecified
Same as the full description in the CMS dataset.
Parent Code
N92
Excessive, frequent and irregular menstruation

Code Classification

ChapterN00–N99Diseases of the genitourinary system
SectionN80-N98Noninflammatory disorders of female genital tract
CategoryN92Excessive, frequent and irregular menstruation
This CodeN92.6Irregular menstruation, unspecified

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Abnormal menstrual cycle
  • Disorder of menstruation
  • Endocrine menstrual disturbance
  • Irregular menstruation in adolescence
  • Irregular periods
  • Period has come early

Tabular List NotesGuidance

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

Inclusion Terms

  • Irregular bleeding NOS
  • Irregular periods NOS

Type 1 Excludes

  • irregular menstruation with:
  • lengthened intervals or scanty bleeding N91.3 N91.5
  • shortened intervals or excessive bleeding N92.1

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.

    • Bleeding
      • irregular
    • Cycle
      • menstrual, irregular
    • Disorder(of)
      • menstrual
    • Irregular, irregularity
      • bleeding
    • Irregular, irregularity
      • menstruation (cause unknown)
    • Irregular, irregularity
      • periods
    • Menstruation
      • cycle, irregular
    • Menstruation
      • irregular
    • Paramenia
    • Periods
      • irregular

Clinical ClassificationClinical

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

CCSR GEN021
Menstrual disorders
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Menstruation

Menstruation, or period, is normal vaginal bleeding that occurs as part of a woman's monthly cycle. Every month, your body prepares for pregnancy. If no pregnancy occurs, the uterus, or womb, sheds its lining. The menstrual blood is partly blood and partly tissue from inside the uterus. It passes out of the body through the vagina.

Read the full article at MedlinePlus

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

Convert N92.6 to ICD-9-CMHistory

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

ICD-9-CM
626.4 Irregular menstruation
Approximate The match is approximate rather than exact.
ICD-9-CM
626.9 Menstrual disorder NOS
Approximate The match is approximate rather than exact.

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 N92.6Overview

Is N92.6 (Excessive, frequent and irregular menstruation) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report irregular menstruation, unspecified on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does N92.6 group to?

When irregular menstruation, 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 N92.6?

Under the General Equivalence Mappings, irregular menstruation, unspecified converts to ICD-9-CM 626.4 (irregular menstruation) and 626.9 (menstrual disorder NOS). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.