2026 ICD-10-CM Diagnosis Code Q64.79Other congenital malformations of bladder and urethra

ICD-10-CM Codes›Q00-Q99›Q60-Q64›Q64

ICD-10-CM Q64.79
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

Q64.79 is a billable ICD-10-CM diagnosis code for other congenital malformations of bladder and urethra. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 698 through 700. 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
Q64.79
Billable Status
Yes — Valid for Submission
Code Describes
Other congenital malformations of bladder and urethra
Short Description
Other congenital malformations of bladder and urethra
Same as the full description in the CMS dataset.
Parent Code
Q64.7
Other and unspecified congenital malformations of bladder and urethra

Code Classification

ChapterQ00-Q99Congenital malformations, deformations and chromosomal abnormalities
SectionQ60-Q64Congenital malformations of the urinary system
CategoryQ64Other congenital malformations of urinary system
This CodeQ64.79Other congenital malformations of bladder and urethra

Present on Admission (POA)Billing

Q64.79 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.

  • Accessory urethra
  • Accessory urinary bladder
  • Congenital cyst of urinary bladder
  • Congenital dilatation of urinary bladder
  • Congenital fistula of rectum
  • Congenital functional disorders of the colon
  • Congenital gastrointestinal-urinary tract fistula
  • Congenital hourglass urinary bladder
  • Congenital hypoplasia of urinary bladder
  • Congenital parameatal cyst
  • Congenital rectovesical fistula
  • Congenital short urethra
  • Congenital urethral syringocele
  • Congenital urethrovaginal fistula
  • Dilatation of urethra
  • Distension of urinary bladder
  • Double urethra
  • Intestinovesical fistula
  • Megacystis, microcolon, hypoperistalsis syndrome
  • Megacystis-megaureter syndrome
  • Megalourethra
  • Partial duplication of urethra
  • Penile megalourethra
  • Rectourinary fistula
  • Urethral cyst
  • Urethral parameatal cyst
  • Urethrovaginal fistula
  • Vesicorectal fistula

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.

    • Accessory(congenital)
      • bladder
    • Accessory(congenital)
      • urethra
    • Anomaly, anomalous(congenital) (unspecified type)
      • bladder
        • specified type NEC
    • Anomaly, anomalous(congenital) (unspecified type)
      • meatus urinarius NEC
    • Anomaly, anomalous(congenital) (unspecified type)
      • paraurethral ducts
    • Anomaly, anomalous(congenital) (unspecified type)
      • urethra
        • specified type NEC
    • Anomaly, anomalous(congenital) (unspecified type)
      • vesicourethral orifice
    • Contraction(s), contracture, contracted
      • hourglass
        • bladder
          • congenital
    • Cyst(colloid) (mucous) (simple) (retention)
      • congenital NEC
        • periurethral (tissue)
    • Deformity
      • bladder (neck) (trigone) (sphincter) (acquired)
        • congenital
    • Deformity
      • urethra (congenital)
    • Deformity
      • vesicourethral orifice (acquired)
        • congenital NEC
    • Dilatation
      • bladder (sphincter)
        • congenital
    • Distortion(s) (congenital)
      • bladder
    • Distortion(s) (congenital)
      • urethra
    • Diverticulum, diverticula(multiple)
      • urethra (acquired)
        • congenital
    • Double
      • bladder
    • Duplication, duplex
      • bladder
    • Fistula(cutaneous)
      • rectovesical
        • congenital
    • Fistula(cutaneous)
      • urethra
        • congenital
    • Fistula(cutaneous)
      • vesicorectal
        • congenital
    • Hernia, hernial(acquired) (recurrent)
      • urethra, congenital
    • Hernia, hernial(acquired) (recurrent)
      • urinary meatus, congenital
    • Malformation(congenital)
      • bladder
    • Malformation(congenital)
      • urethra
    • Paramedial urethrovesical orifice
    • Paraurethral duct

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 Q64.79 to ICD-9-CMHistory

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

ICD-9-CM
753.8 Cystourethral 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 Q64.79Overview

Is Q64.79 a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report other congenital malformations of bladder and urethra on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does Q64.79 group to?

When other congenital malformations of bladder and urethra is the principal diagnosis on an inpatient stay, it groups to MS-DRG 698, 699, 700, with relative weights from 0.6899 to 1.6544 depending on complications. Higher weights mean higher Medicare reimbursement.

Is Q64.79 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 other congenital malformations of bladder and urethra on inpatient claims.

What is the ICD-9 equivalent of Q64.79?

Under the General Equivalence Mappings, other congenital malformations of bladder and urethra converts to ICD-9-CM 753.8 (cystourethral 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.