2026 ICD-10-CM Diagnosis Code N85.00Endometrial hyperplasia, unspecified

ICD-10-CM Codes›N00–N99›N80-N98›N85

ICD-10-CM N85.00
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

N85.00 is a billable ICD-10-CM diagnosis code for endometrial hyperplasia, 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 uterine bleeding due to endometrial disorder. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified female genital disorders.

Code Identity

ICD-10-CM Code
N85.00
Billable Status
Yes — Valid for Submission
Code Describes
Endometrial hyperplasia, unspecified
Short Description
Endometrial hyperplasia, unspecified
Same as the full description in the CMS dataset.
Parent Code
N85.0
Endometrial hyperplasia

Code Classification

ChapterN00–N99Diseases of the genitourinary system
SectionN80-N98Noninflammatory disorders of female genital tract
CategoryN85Other noninflammatory disorders of uterus, except cervix
This CodeN85.00Endometrial hyperplasia, unspecified

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Abnormal uterine bleeding due to endometrial disorder
  • Abnormal uterine bleeding due to endometrial hyperplasia
  • Endometrial cystic hyperplasia
  • Endometrial hyperplasia
  • Hypoplasia of endometrium

Tabular List NotesGuidance

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

Inclusion Terms

  • Hyperplasia (adenomatous) (cystic) (glandular) of endometrium
  • Hyperplastic endometritis

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.

    • Atypical, atypism
      • endometrium
        • hyperplasia
    • Endometritis(decidual) (nonspecific) (purulent) (senile) (atrophic) (suppurative)
      • hyperplastic
    • Hyperplasia, hyperplastic
      • endometrium, endometrial (adenomatous) (cystic) (glandular) (glandular-cystic) (polypoid)
    • Hyperplasia, hyperplastic
      • glandularis cystica uteri (interstitialis)
    • Hyperplasia, hyperplastic
      • uterus, uterine
        • endometrium (glandular)
    • Hypertrophy, hypertrophic
      • endometrium (glandular)

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

Clinical InformationClinical

  • Endometrial Hyperplasia

    benign proliferation of the endometrium in the uterus. endometrial hyperplasia is classified by its cytology and glandular tissue. there are simple, complex (adenomatous without atypia), and atypical hyperplasia representing also the ascending risk of becoming malignant.

Patient EducationClinical

Uterine Diseases

The uterus, or womb, is the place where a fetus grows during pregnancy. Uterine diseases are conditions that affect the uterus. These diseases can be benign (not cancer) or malignant (cancerous). They may affect your menstrual periods, your ability to get pregnant, or the health of your reproductive organs.

The full article covers:

  • What are uterine diseases?
  • What causes uterine diseases?
  • What are the symptoms of uterine diseases?
  • How are uterine diseases diagnosed?
  • What are the treatments for uterine diseases?

Read the full article at MedlinePlus

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

Convert N85.00 to ICD-9-CMHistory

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

ICD-9-CM
621.30 Endometrial hyperpla 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 N85.00Overview

Is N85.00 (Endometrial hyperplasia) a billable code?

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

What MS-DRG does N85.00 group to?

When endometrial hyperplasia, 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 N85.00?

Under the General Equivalence Mappings, endometrial hyperplasia, unspecified converts to ICD-9-CM 621.30 (endometrial hyperpla NOS). The mapping is a direct match.

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.