2026 ICD-10-CM Diagnosis Code Q51.9Congenital malformation of uterus and cervix, unspecified

ICD-10-CM Codes›Q00-Q99›Q50-Q56›Q51

ICD-10-CM Q51.9
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

Q51.9 is a billable ICD-10-CM diagnosis code for congenital malformation of uterus and cervix, unspecified. 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. Coders also document this condition as congenital abnormality of uterus in pregnancy, childbirth and the puerperium. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Genitourinary congenital anomalies.

Code Identity

ICD-10-CM Code
Q51.9
Billable Status
Yes — Valid for Submission
Code Describes
Congenital malformation of uterus and cervix, unspecified
Short Description
Congenital malformation of uterus and cervix, unspecified
Same as the full description in the CMS dataset.
Parent Code
Q51
Congenital malformations of uterus and cervix

Code Classification

ChapterQ00-Q99Congenital malformations, deformations and chromosomal abnormalities
SectionQ50-Q56Congenital malformations of genital organs
CategoryQ51Congenital malformations of uterus and cervix
This CodeQ51.9Congenital malformation of uterus and cervix, unspecified

Present on Admission (POA)Billing

Q51.9 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.

  • Congenital abnormality of uterus in pregnancy, childbirth and the puerperium
  • Congenital anomaly of cervix
  • Congenital malformation of uterus and cervix
  • Congenital uterine anomaly

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.

    • Anomaly, anomalous(congenital) (unspecified type)
      • cervix
    • Anomaly, anomalous(congenital) (unspecified type)
      • uterus
    • Deformity
      • cervix (uterus) (acquired) NEC
        • congenital
    • Deformity
      • uterus (congenital)
    • Distortion(s) (congenital)
      • cervix (uteri)
    • Distortion(s) (congenital)
      • uterus
    • Malformation(congenital)
      • cervix uteri
    • Malformation(congenital)
      • uterus

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.

Convert Q51.9 to ICD-9-CMHistory

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

ICD-9-CM
752.39 Anomalies of uterus NEC
Approximate The match is approximate rather than exact.
ICD-9-CM
752.49 Cervix/fem gen anom NEC
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 Q51.9Overview

Is Q51.9 (Congenital malformations of uterus and cervix) a billable code?

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

What MS-DRG does Q51.9 group to?

When congenital malformation of uterus and cervix, unspecified 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 Q51.9 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 congenital malformation of uterus and cervix, unspecified on inpatient claims.

What is the ICD-9 equivalent of Q51.9?

Under the General Equivalence Mappings, congenital malformation of uterus and cervix, unspecified converts to ICD-9-CM 752.39 (anomalies of uterus NEC) and 752.49 (cervix/fem gen anom NEC). 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.