2026 ICD-10-CM Diagnosis Code N94.4Primary dysmenorrhea

ICD-10-CM Codes›N00–N99›N80-N98›N94

ICD-10-CM N94.4
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

N94.4 is a billable ICD-10-CM diagnosis code for primary dysmenorrhea. 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 dysmenorrhea. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Menstrual disorders.

Code Identity

ICD-10-CM Code
N94.4
Billable Status
Yes — Valid for Submission
Code Describes
Primary dysmenorrhea
Short Description
Primary dysmenorrhea
Same as the full description in the CMS dataset.
Parent Code
N94
Pain and other conditions associated with female genital organs and menstrual cycle

Code Classification

ChapterN00–N99Diseases of the genitourinary system
SectionN80-N98Noninflammatory disorders of female genital tract
CategoryN94Pain and other conditions associated with female genital organs and menstrual cycle
This CodeN94.4Primary dysmenorrhea

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Dysmenorrhea
  • Pain of uterus
  • Primary dysmenorrhea

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.

    • Dysmenorrhea(essential) (exfoliative)
      • primary
    • Menstruation
      • painful
        • primary

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

  • Dysmenorrhea

    painful menstruation.

  • Grade 2 Dysmenorrhea, CTCAE|Grade 2 Dysmenorrhea

    moderate symptoms; limiting instrumental adl or mild/moderate impact on age-appropriate normal daily activity (pediatric)

  • Grade 3 Dysmenorrhea, CTCAE|Grade 3 Dysmenorrhea

    severe symptoms; limiting self-care adl or severe impact on age-appropriate normal daily activity (pediatric)

  • Dysmenorrhea

    abnormally painful abdominal cramps during menstruation.

  • Dysmenorrhea, CTCAE|Dysmenorrhea|Dysmenorrhea

    a disorder characterized by abnormally painful abdominal cramps during menses.

  • Grade 1 Dysmenorrhea, CTCAE|Grade 1 Dysmenorrhea

    mild symptoms; intervention not indicated

  • Grade 2 Dysmenorrhea, CTCAE|Grade 2 Dysmenorrhea

    moderate symptoms; limiting instrumental adl

  • Grade 3 Dysmenorrhea, CTCAE|Grade 3 Dysmenorrhea

    severe symptoms; limiting self care adl

Patient EducationClinical

Period Pain

Menstruation, or period, is normal vaginal bleeding that happens as part of a woman's monthly cycle. Many women have painful periods, also called dysmenorrhea. The pain is most often menstrual cramps, which are a throbbing, cramping pain in your lower abdomen.

The full article covers:

  • What are painful periods?
  • What causes painful periods?
  • What can I do about period pain?
  • When should I get medical help for my period pain?
  • How is the cause of severe period pain diagnosed?
  • What are treatments for severe period pain?

Read the full article at MedlinePlus

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

Convert N94.4 to ICD-9-CMHistory

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

ICD-9-CM
625.3 Dysmenorrhea
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 N94.4Overview

Is N94.4 a billable code?

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

What MS-DRG does N94.4 group to?

When primary dysmenorrhea 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 N94.4?

Under the General Equivalence Mappings, primary dysmenorrhea converts to ICD-9-CM 625.3 (dysmenorrhea). 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.