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

N92.6 is a billable ICD-10-CM diagnosis code for irregular menstruation, unspecified. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) 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

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to N92.6: its own notes plus those printed at N92 and Chapter 14. A note printed at a category, block or chapter applies to every code under it.

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.

  • Irregular bleeding NOS
  • Irregular periods NOS

Excludes1

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

On N92.6 itself
  • irregular menstruation with:
  • lengthened intervals or scanty bleeding (N91.3-N91.5)
  • shortened intervals or excessive bleeding (N92.1)
From N92 Excessive, frequent and irregular menstruation applies to 7 codes
  • postmenopausal bleeding (N95.0)
  • precocious puberty (menstruation) (E30.1)

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 Chapter 14 (N00-N99) Diseases of the genitourinary system applies to 838 codes
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)

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

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

Clinical InformationClinical

  • Irregular Menstruation

    deviations from the normal process; e.g. delayed, difficult, profuse, scanty, unusual bleeding, etc.

Patient EducationClinical

Menstruation

Menstruation, also called a period, is normal vaginal bleeding that happens as part of the monthly cycle in women and girls. Every month, the body prepares for pregnancy. If pregnancy does not happen, the uterus (womb) sheds its lining. This blood and tissue leave the body through the vagina.

The full article covers:

  • What is menstruation?
  • What is the menstrual cycle?
  • When will my period start?
  • What are the symptoms of menstruation?
  • What are menstrual irregularities?

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 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About N92.6Overview

What is the ICD-10 code for irregular menstruation, unspecified?

The ICD-10-CM code for irregular menstruation, unspecified is N92.6 (sometimes written as N926). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

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, 2026 through September 30, 2027.

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 0.7039 to 1.8448 depending on complications. Higher weights mean higher Medicare reimbursement.

Can N92.6 be reported with N92.1?

Not as a rule. The Excludes1 note on N92.6 lists "shortened intervals or excessive bleeding (N92.1)". 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).

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.