2026 ICD-10-CM Diagnosis Code D39.9Neoplasm of uncertain behavior of female genital organ, unspecified
ICD-10-CM Codes›C00–D49›D37-D48›D39
- Billable — Valid for Submission
- Not Chronic
D39.9 is a billable ICD-10-CM diagnosis code for neoplasm of uncertain behavior of female genital organ, unspecified. 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. Coders also document this condition as neoplasm of uncertain behavior of female genital organ. 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.
- Neoplasm of uncertain behavior of female genital organ
- Neoplasm of uncertain behavior of genitourinary organs
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Table of NeoplasmsClinical
Anatomical sites in the Table of Neoplasms that reference this code family.
| Site | Malig. Primary | Malig. Secondary | Ca in situ | Benign | Uncertain | Unspec. |
|---|---|---|---|---|---|---|
| genital organ or tract | C57.9 | C79.82 | D07.30 | D28.9 | D39.9 | D49.59 |
| genital organ or tract › female NEC | C57.9 | C79.82 | D07.30 | D28.9 | D39.9 | D49.59 |
| genitourinary tract | C57.9 | C79.82 | D07.30 | D28.9 | D39.9 | D49.59 |
| genitourinary tract › female | C57.9 | C79.82 | D07.30 | D28.9 | D39.9 | D49.59 |
| septum › urethrovaginal | C57.9 | C79.82 | D07.30 | D28.9 | D39.9 | D49.59 |
| septum › vesicovaginal | C57.9 | C79.82 | D07.30 | D28.9 | D39.9 | D49.59 |
| vaginovesical | C57.9 | C79.82 | D07.30 | D28.9 | D39.9 | D49.59 |
| vaginovesical › septum | C57.9 | C79.82 | D07.30 | D28.9 | D39.9 | D49.59 |
| vesicocervical tissue | C57.9 | C79.82 | D07.30 | D28.9 | D39.9 | D49.59 |
| vesicovaginal | C57.9 | C79.82 | D07.30 | D28.9 | D39.9 | D49.59 |
Patient EducationClinical
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Convert D39.9 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About D39.9Overview
Is D39.9 (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 female genital organ, unspecified on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does D39.9 group to?
When neoplasm of uncertain behavior of female genital organ, unspecified 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 D39.9?
Under the General Equivalence Mappings, neoplasm of uncertain behavior of female genital organ, unspecified converts to ICD-9-CM 236.3 (unc behav neo female NEC). 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.
