2026 ICD-10-CM Diagnosis Code D39.10Neoplasm of uncertain behavior of unspecified ovary
ICD-10-CM Codes›C00–D49›D37-D48›D39
- Billable — Valid for Submission
- Not Chronic
D39.10 is a billable ICD-10-CM diagnosis code for neoplasm of uncertain behavior of unspecified ovary. 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
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Borderline Brenner tumor of ovary
- Borderline epithelial tumor of ovary
- Gonadoblastoma
- Gynandroblastoma of ovary
- Malignant granulosa cell tumor of ovary
- Malignant sex cord tumor of ovary
- Mucinous borderline tumor of ovary
- Neoplasm of low malignant potential behavior of ovary
- Neoplasm of uncertain behavior of ovary
- Ovarian gonadoblastoma
- Sex cord tumor of ovary of uncertain behavior
- Virilizing ovarian tumor
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
- endometrioid - D27.9
- borderline malignancy - D39.10
- female - D39.10
- female - D39.10
- Cyst (colloid) (mucous) (simple) (retention)
- multilocular (ovary) - D39.10
- ovary, ovarian (twisted) - N83.20
- multilocular - D39.10
- female - D39.10
- female - D39.10
- female - D39.10
- Papilloma - See Also: Neoplasm, benign, by site;
- unspecified site - D39.10
- Tumor - See Also: Neoplasm, unspecified behavior, by site;
- Leydig cell - See: Neoplasm, uncertain behavior, by site;
- female - D39.10
External Cause of Injuries IndexGuidance
References for this code in the External Cause of Injuries Index.
- Adenofibroma
- endometrioid
- borderline malignancy
- Androblastoma
- unspecified site
- female
- Arrhenoblastoma
- unspecified site
- female
- Cyst(colloid) (mucous) (simple) (retention)
- multilocular (ovary)
- Cyst(colloid) (mucous) (simple) (retention)
- ovary, ovarian (twisted)
- multilocular
- Gonadoblastoma
- unspecified site
- female
- Gonocytoma
- unspecified site
- female
- Gynandroblastoma
- unspecified site
- female
- Papilloma
- serous surface
- borderline malignancy
- unspecified site
- Tumor
- Leydig cell
- unspecified site
- female
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Gonadoblastoma
a complex neoplasm composed of a mixture of gonadal elements, such as large primordial germ cells, immature sertoli cells or granulosa cells of the sex cord, and gonadal stromal cells. gonadoblastomas are most often associated with gonadal dysgenesis, 46, xy.Gonadoblastoma
a mixed germ cell/sex cord-stromal tumor characterized by the presence of large germ cells which resemble seminoma cells and small cells which resemble sertoli or granulosa cells. it occurs in the testis and the ovary and is identified in children and adults. it is often associated with gonadal dysgenesis and abnormal karyotype.Ovarian Gonadoblastoma
a neoplasm that arises from the ovary and is composed of tissues that resemble dysgerminoma or seminoma and are admixed with sex cord tissues. it is found in children or young adults and usually is associated with secondary sex organs abnormalities. the majority of patients present as phenotypic females with virilization. the minority of patients present as phenotypic males with feminization. it typically affects both gonads. if a malignant germ cell component is present, it may metastasize to other anatomic sites.Testicular Gonadoblastoma
a testicular mixed germ cell-sex cord-stromal tumor. it is usually associated with mixed gonadal dysgenesis and ambiguous genitalia. it is characterized by the presence of nests of large neoplastic germ cells and immature cells that resemble sertoli cells.
Table of NeoplasmsClinical
Patient EducationClinical
Ovarian Disorders
The ovaries are a pair of female reproductive glands that make eggs and female hormones. Women have one ovary on each side of the uterus (where a fetus grows during pregnancy). Each ovary is about the size and shape of an almond.
The full article covers:
- What are ovaries?
- What are the types of ovarian disorders?
- What causes ovarian disorders?
- What are the symptoms of ovarian disorders?
- How are ovarian disorders diagnosed?
- What are the treatments for ovarian disorders?
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert D39.10 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About D39.10Overview
Is D39.10 (Neoplasm of uncertain behavior of ovary) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report neoplasm of uncertain behavior of unspecified ovary on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does D39.10 group to?
When neoplasm of uncertain behavior of unspecified ovary 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 D39.10?
Under the General Equivalence Mappings, neoplasm of uncertain behavior of unspecified ovary converts to ICD-9-CM 236.2 (unc behav neo ovary). The mapping is approximate, so confirm the match fits the documentation.
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.
