2026 ICD-10-CM Diagnosis Code Q52.121Longitudinal vaginal septum, obstructing, right side

ICD-10-CM Codes›Q00-Q99›Q50-Q56›Q52

ICD-10-CM Q52.121
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

Q52.121 is a billable ICD-10-CM diagnosis code for longitudinal vaginal septum, obstructing, right side. 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
Q52.121
Billable Status
Yes — Valid for Submission
Code Describes
Longitudinal vaginal septum, obstructing, right side
Short Description
Longitudinal vaginal septum, obstructing, right side
Same as the full description in the CMS dataset.
Parent Code
Q52.12
Longitudinal vaginal septum

Code Classification

ChapterQ00-Q99Congenital malformations, deformations and chromosomal abnormalities
SectionQ50-Q56Congenital malformations of genital organs
CategoryQ52Other congenital malformations of female genitalia
This CodeQ52.121Longitudinal vaginal septum, obstructing, right side

Present on Admission (POA)Billing

Q52.121 is exempt from POA reporting on inpatient claims to general acute care hospitals. Review other POA exempt codes.

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.

    • Septum, septate(congenital)
      • vagina
        • longitudinal
          • obstructing
            • right side

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 Q52.121 to ICD-9-CMHistory

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

ICD-9-CM
752.47 Longitud vaginal septum
Approximate The match is approximate rather than exact.

Code HistoryHistory

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 Q52.121Overview

Is Q52.121 (Longitudinal vaginal septum) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report longitudinal vaginal septum, obstructing, right side on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does Q52.121 group to?

When longitudinal vaginal septum, obstructing, right side 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 Q52.121 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 longitudinal vaginal septum, obstructing, right side on inpatient claims.

What is the ICD-9 equivalent of Q52.121?

Under the General Equivalence Mappings, longitudinal vaginal septum, obstructing, right side converts to ICD-9-CM 752.47 (longitud vaginal septum). 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.