2026 ICD-10-CM Diagnosis Code N83.312Acquired atrophy of left ovary

ICD-10-CM Codes›N00–N99›N80-N98›N83

ICD-10-CM N83.312
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

N83.312 is a billable ICD-10-CM diagnosis code for acquired atrophy of left ovary. 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. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified female genital disorders.

Code Identity

ICD-10-CM Code
N83.312
Billable Status
Yes — Valid for Submission
Code Describes
Acquired atrophy of left ovary
Short Description
Acquired atrophy of left ovary
Same as the full description in the CMS dataset.
Parent Code
N83.31
Acquired atrophy of ovary

Code Classification

ChapterN00–N99Diseases of the genitourinary system
SectionN80-N98Noninflammatory disorders of female genital tract
CategoryN83Noninflammatory disorders of ovary, fallopian tube and broad ligament
This CodeN83.312Acquired atrophy of left ovary

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

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 N83.312 to ICD-9-CMHistory

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

ICD-9-CM
620.3 Acq atrophy ovary & tube
Approximate The match is approximate rather than exact.

Code History & ChangesHistory

Replacement N83.312 replaces the following previously assigned code(s):

  • N83.31 - Acquired atrophy of ovary
FY 2018AddedAdded to the ICD-10-CM code setEffective October 1, 2017.
FY 2019–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About N83.312Overview

Is N83.312 (Acquired atrophy of ovary) a billable code?

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

What MS-DRG does N83.312 group to?

When acquired atrophy of left ovary 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 N83.312?

Under the General Equivalence Mappings, acquired atrophy of left ovary converts to ICD-9-CM 620.3 (acq atrophy ovary & tube). The mapping is approximate, so confirm the match fits the documentation.

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.