2027 ICD-10-CM Diagnosis Code Q64.2Congenital posterior urethral valves

ICD-10-CM Codes›Q00-Q99›Q60-Q64›Q64

ICD-10-CM Q64.2
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

Q64.2 is a billable ICD-10-CM diagnosis code for congenital posterior urethral valves. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 698 through 700. As a secondary diagnosis, it counts as a complication or comorbidity (CC) and moves an inpatient stay to a higher severity level within its MS-DRG family. It does not count, however, when the principal diagnosis is one of 8 closely related codes. The code is exempt from POA reporting. Coders also document this condition as congenital anterior urethral valve. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Genitourinary congenital anomalies.

Code Identity

ICD-10-CM Code
Q64.2
Billable Status
Yes — Valid for Submission
Code Describes
Congenital posterior urethral valves
Short Description
Congenital posterior urethral valves
Same as the full description in the CMS dataset.
Parent Code
Q64
Other congenital malformations of urinary system

Code Classification

ChapterQ00-Q99Congenital malformations, deformations and chromosomal abnormalities
SectionQ60-Q64Congenital malformations of the urinary system
CategoryQ64Other congenital malformations of urinary system
This CodeQ64.2Congenital posterior urethral valves

Present on Admission (POA)Billing

Q64.2 is exempt from POA reporting on inpatient claims to general acute care hospitals. Review the other POA exempt codes in Congenital malformations of the urinary system (Q60-Q64).

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Congenital anterior urethral valve
  • Congenital posterior urethral valves
  • Congenital stricture of urethra
  • Congenital urethral posterior valvular stricture
  • Congenital urethral valve
  • Congenital urethral valvular stricture

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to Q64.2: its own notes plus those printed at Chapter 17. A note printed at a category, block or chapter applies to every code under it.

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From Chapter 17 (Q00-QA1) Congenital malformations, deformations and chromosomal abnormalities applies to 900 codes
  • inborn errors of metabolism (E70-E88)

Notes

General instructions on how these codes are used.

From Chapter 17 (Q00-QA1) Congenital malformations, deformations and chromosomal abnormalities applies to 900 codes
  • Codes from this chapter are not for use on maternal records

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

Clinical ClassificationClinical

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

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

Clinical InformationClinical

  • Posterior Urethral Valve

    a developmental abnormality characterized by the presence of an obstructing membrane in the posterior urethra of the male newborn. it results in bladder obstruction.

Patient EducationClinical

Urethral Disorders

The urethra is the tube that allows urine to pass out of the body. In men, it's a long tube that runs through the penis. It also carries semen in men. In women, it's short and is just above the vagina. Urethral problems may happen due to aging, illness, or injury. They include:

Read the full article at MedlinePlus

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

Convert Q64.2 to ICD-9-CMHistory

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

ICD-9-CM
753.6 Congen urethral stenosis
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 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About Q64.2Overview

What is the ICD-10 code for congenital posterior urethral valves?

The ICD-10-CM code for congenital posterior urethral valves is Q64.2 (sometimes written as Q642). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is Q64.2 (Other congenital malformations of urinary system) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report congenital posterior urethral valves on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does Q64.2 group to?

When congenital posterior urethral valves is the principal diagnosis on an inpatient stay, it groups to MS-DRG 699, 698, 700, with relative weights from 0.6740 to 1.6400 depending on complications. Higher weights mean higher Medicare reimbursement.

Is Q64.2 a CC or MCC?

CMS lists Q64.2 as a CC (complication or comorbidity) for FY 2027. Reported as a secondary diagnosis, it moves the inpatient stay to a higher-weighted DRG within its severity family. It does not count when the principal diagnosis is one of the 8 closely related codes in its exclusion list.

Is Q64.2 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 posterior urethral valves on inpatient claims. The code appears in the Congenital malformations of the urinary system (Q60-Q64) range of the CMS exempt list.