2026 ICD-10-CM Diagnosis Code D39.0Neoplasm of uncertain behavior of uterus

ICD-10-CM Codes›C00–D49›D37-D48›D39

ICD-10-CM D39.0
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

D39.0 is a billable ICD-10-CM diagnosis code for neoplasm of uncertain behavior of uterus. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 736 through 741, 754 through 756. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Neoplasms of unspecified nature or uncertain behavior.

Code Identity

ICD-10-CM Code
D39.0
Billable Status
Yes — Valid for Submission
Code Describes
Neoplasm of uncertain behavior of uterus
Short Description
Neoplasm of uncertain behavior of uterus
Same as the full description in the CMS dataset.
Parent Code
D39
Neoplasm of uncertain behavior of female genital organs

Code Classification

ChapterC00–D49Neoplasms
SectionD37-D48Neoplasms of uncertain behavior, polycythemia vera and myelodysplastic syndromes
CategoryD39Neoplasm of uncertain behavior of female genital organs
This CodeD39.0Neoplasm of uncertain behavior of uterus

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Complex mixed and stromal malignant neoplasm of endometrium of corpus uteri
  • Endometrial stromal tumor
  • Intravenous leiomyomatosis
  • Metastasizing leiomyoma of uterus
  • Neoplasm of exocervix
  • Neoplasm of isthmus of uterus
  • Neoplasm of uncertain behavior of body of uterus
  • Neoplasm of uncertain behavior of endocervix
  • Neoplasm of uncertain behavior of endometrium
  • Neoplasm of uncertain behavior of exocervix
  • Neoplasm of uncertain behavior of isthmus of uterus
  • Neoplasm of uncertain behavior of myometrium
  • Neoplasm of uncertain behavior of uterine cervix
  • Neoplasm of uncertain behavior of uterus

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.

    • Endometriosis
      • stromal
    • Myosis(pupil)
      • stromal (endolymphatic)
    • Stromatosis, endometrial
    • Tumor
      • stromal
        • endometrial

Clinical ClassificationClinical

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

CCSR NEO072
Neoplasms of unspecified nature or uncertain behavior
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Myometrium

    the smooth muscle coat of the uterus, which forms the main mass of the organ.

  • Intravenous Leiomyomatosis

    a rare benign neoplasm characterized by the presence of smooth muscle cells growing within veins.

  • Uterine Corpus Intravenous Leiomyomatosis|Intravascular Leiomyomatosis of Uterus|Intravascular Leiomyomatosis of the Uterus|Intravenous Leiomyomatosis of Uterus|Intravenous Leiomyomatosis of the Uterus

    a rare benign neoplasm characterized by the presence of smooth muscle cells growing within the veins of the uterine corpus. the intravascular neoplasm growth occurs outside the confines of an adjacent leiomyoma.

Table of NeoplasmsClinical

Anatomical sites in the Table of Neoplasms that reference this code family.

SiteMalig.
Primary		Malig.
Secondary		Ca
in situ		BenignUncertainUnspec.
cervix (cervical) (uteri) (uterus)C53.9C79.82D06.9D26.0D39.0D49.59
cervix (cervical) (uteri) (uterus) › canalC53.0C79.82D06.0D26.0D39.0D49.59
cervix (cervical) (uteri) (uterus) › endocervix (canal) (gland)C53.0C79.82D06.0D26.0D39.0D49.59
cervix (cervical) (uteri) (uterus) › exocervixC53.1C79.82D06.1D26.0D39.0D49.59
cervix (cervical) (uteri) (uterus) › external osC53.1C79.82D06.1D26.0D39.0D49.59
cervix (cervical) (uteri) (uterus) › internal osC53.0C79.82D06.0D26.0D39.0D49.59
cervix (cervical) (uteri) (uterus) › nabothian glandC53.0C79.82D06.0D26.0D39.0D49.59
cervix (cervical) (uteri) (uterus) › squamocolumnar junctionC53.8C79.82D06.7D26.0D39.0D49.59
cervix (cervical) (uteri) (uterus) › stumpC53.8C79.82D06.7D26.0D39.0D49.59
corpus › uteriC54.9C79.82D07.0D26.1D39.0D49.59
corpus › uteri › isthmusC54.0C79.82D07.0D26.1D39.0D49.59
endocervix (canal) (gland)C53.0C79.82D06.0D26.0D39.0D49.59
endometrium (gland) (stroma)C54.1C79.82D07.0D26.1D39.0D49.59
exocervixC53.1C79.82D06.1D26.0D39.0D49.59
external › os, cervix uteriC53.1C79.82D06.1D26.0D39.0D49.59
follicle, nabothianC53.0C79.82D06.0D26.0D39.0D49.59
fundus › uterusC54.3C79.82D07.0D26.1D39.0D49.59
internal › os (cervix)C53.0C79.82D06.0D26.0D39.0D49.59
isthmus uteriC54.0C79.82D07.0D26.1D39.0D49.59
junction › squamocolumnar, of cervixC53.8C79.82D06.7D26.0D39.0D49.59
myometriumC54.2C79.82D07.0D26.1D39.0D49.59
nabothian gland (follicle)C53.0C79.82D06.0D26.0D39.0D49.59
osC53.1C79.82D06.1D26.0D39.0D49.59
os › externalC53.1C79.82D06.1D26.0D39.0D49.59
os › internalC53.0C79.82D06.0D26.0D39.0D49.59
stroma, endometrialC54.1C79.82D07.0D26.1D39.0D49.59
stump, cervicalC53.8C79.82D06.7D26.0D39.0D49.59
uterus, uteri, uterineC55C79.82D07.0D26.9D39.0D49.59
uterus, uteri, uterine › bodyC54.9C79.82D07.0D26.1D39.0D49.59
uterus, uteri, uterine › cervixC53.9C79.82D06.9D26.0D39.0D49.59
uterus, uteri, uterine › cornuC54.9C79.82D07.0D26.1D39.0D49.59
uterus, uteri, uterine › corpusC54.9C79.82D07.0D26.1D39.0D49.59
uterus, uteri, uterine › endocervix (canal) (gland)C53.0C79.82D06.0D26.0D39.0D49.59
uterus, uteri, uterine › endometriumC54.1C79.82D07.0D26.1D39.0D49.59
uterus, uteri, uterine › exocervixC53.1C79.82D06.1D26.0D39.0D49.59
uterus, uteri, uterine › external osC53.1C79.82D06.1D26.0D39.0D49.59
uterus, uteri, uterine › fundusC54.3C79.82D07.0D26.1D39.0D49.59
uterus, uteri, uterine › internal osC53.0C79.82D06.0D26.0D39.0D49.59
uterus, uteri, uterine › isthmusC54.0C79.82D07.0D26.1D39.0D49.59
uterus, uteri, uterine › lower segmentC54.0C79.82D07.0D26.1D39.0D49.59
uterus, uteri, uterine › myometriumC54.2C79.82D07.0D26.1D39.0D49.59
uterus, uteri, uterine › squamocolumnar junctionC53.8C79.82D06.7D26.0D39.0D49.59

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 D39.0 to ICD-9-CMHistory

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

ICD-9-CM
236.0 Uncert behav neo uterus
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 D39.0Overview

Is D39.0 (Neoplasm of uncertain behavior of female genital organs) a billable code?

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

What MS-DRG does D39.0 group to?

When neoplasm of uncertain behavior of uterus is the principal diagnosis on an inpatient stay, it groups to MS-DRG 736, 737, 738, 739, 740, 741, 754, 755, 756, with relative weights from 0.9605 to 3.5745 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of D39.0?

Under the General Equivalence Mappings, neoplasm of uncertain behavior of uterus converts to ICD-9-CM 236.0 (uncert behav neo uterus). 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.