2026 ICD-10-CM Diagnosis Code Z90.721Acquired absence of ovaries, unilateral

ICD-10-CM Codes›Z00–Z99›Z77-Z99›Z90

ICD-10-CM Z90.721
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

Z90.721 is a billable ICD-10-CM diagnosis code for acquired absence of ovaries, unilateral. 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. The code is not accepted as a principal diagnosis by the Medicare Code Editor and exempt from POA reporting. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Acquired absence of limb or organ.

Code Identity

ICD-10-CM Code
Z90.721
Billable Status
Yes — Valid for Submission
Code Describes
Acquired absence of ovaries, unilateral
Short Description
Acquired absence of ovaries, unilateral
Same as the full description in the CMS dataset.
Parent Code
Z90.72
Acquired absence of ovaries

Code Classification

ChapterZ00–Z99Factors influencing health status and contact with health services
SectionZ77-Z99Persons with potential health hazards related to family and personal history and certain conditions influencing health status
CategoryZ90Acquired absence of organs, not elsewhere classified
This CodeZ90.721Acquired absence of ovaries, unilateral

Code EditsBilling

Medicare Code Editor checks that affect claim validity for Z90.721.

Unacceptable principal diagnosis
There are selected codes that describe a circumstance which influences an individual's health status but not a current illness or injury, or codes that are not specific manifestations but may be due to an underlying cause. These codes are considered unacceptable as a principal diagnosis.

Present on Admission (POA)Billing

Z90.721 is exempt from POA reporting on inpatient claims to general acute care hospitals. Review other POA exempt codes.

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Acquired absence of female genital organ
  • Acquired absence of genital organ
  • Acquired absence of ovary
  • History of left oophorectomy
  • History of left salpingectomy
  • History of left salpingo-oophorectomy
  • History of prophylactic oophorectomy
  • History of right oophorectomy
  • History of right salpingectomy
  • History of right salpingo-oophorectomy
  • History of salpingectomy
  • Ovary absent

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.

    • Absence(of) (organ or part) (complete or partial)
      • ovary (acquired)
        • unilateral
    • Absence(of) (organ or part) (complete or partial)
      • oviduct (acquired)
        • unilateral
    • Status(post)
      • oophorectomy
        • unilateral
    • Status(post)
      • salpingo-oophorectomy
        • unilateral

Clinical ClassificationClinical

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

CCSR FAC022
Acquired absence of limb or organ
Default principal diagnosis: inpatient No · outpatient Yes

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 Z90.721 to ICD-9-CMHistory

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

ICD-9-CM
V45.77 Acq absnce genital organ
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 Z90.721Overview

Is Z90.721 (Acquired absence of ovaries) a billable code?

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

What MS-DRG does Z90.721 group to?

On inpatient claims, acquired absence of ovaries, unilateral maps 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.

Can Z90.721 be a principal diagnosis?

No. The Medicare Code Editor rejects this code as a principal diagnosis because acquired absence of ovaries, unilateral describes a circumstance that influences health status rather than a current illness. Report it as a secondary diagnosis.

Is Z90.721 exempt from POA reporting?

Yes. CMS lists this code among those exempt from present on admission reporting, so hospitals do not assign a POA indicator for acquired absence of ovaries, unilateral on inpatient claims.

What is the ICD-9 equivalent of Z90.721?

Under the General Equivalence Mappings, acquired absence of ovaries, unilateral converts to ICD-9-CM V45.77 (acq absnce genital organ). The mapping is approximate, so confirm the match fits the documentation.