2026 ICD-10-CM Diagnosis Code Q51.22Partial doubling of uterus

ICD-10-CM Codes›Q00-Q99›Q50-Q56›Q51

ICD-10-CM Q51.22
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

Q51.22 is a billable ICD-10-CM diagnosis code for partial doubling of uterus. 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 exempt from POA reporting. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Genitourinary congenital anomalies.

Code Identity

ICD-10-CM Code
Q51.22
Billable Status
Yes — Valid for Submission
Code Describes
Partial doubling of uterus
Short Description
Partial doubling of uterus
Same as the full description in the CMS dataset.
Parent Code
Q51.2
Other doubling of uterus

Code Classification

ChapterQ00-Q99Congenital malformations, deformations and chromosomal abnormalities
SectionQ50-Q56Congenital malformations of genital organs
CategoryQ51Congenital malformations of uterus and cervix
This CodeQ51.22Partial doubling of uterus

Present on Admission (POA)Billing

Q51.22 is exempt from POA reporting on inpatient claims to general acute care hospitals. Review other POA exempt codes.

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Inclusion Terms

  • Partial septate 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.

    • Double
      • uterus
        • partial
    • Septum, septate(congenital)
      • uterus
        • partial

Clinical ClassificationClinical

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

CCSR MAL003
Genitourinary congenital anomalies
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Birth Defects

A birth defect is a problem that happens while a baby is developing in the mother's body. Most birth defects happen during the first 3 months of pregnancy. One out of every 33 babies in the United States is born with a birth defect.

The full article covers:

  • What are birth defects?
  • What causes birth defects?
  • Who is at risk of having a baby with birth defects?
  • How are birth defects diagnosed?
  • What are the treatments for birth defects?
  • Can birth defects be prevented?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code History & ChangesHistory

Replacement Q51.22 replaces the following previously assigned code(s):

  • Q51.2 - Other doubling of uterus
FY 2019AddedAdded to the ICD-10-CM code setEffective October 1, 2018.
FY 2020No changes
FY 2021RevisedCode revised
FY 2022–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About Q51.22Overview

Is Q51.22 (Other doubling of uterus) a billable code?

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

What MS-DRG does Q51.22 group to?

When partial doubling of uterus 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.

Is Q51.22 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 partial doubling of uterus on inpatient claims.

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.