2026 ICD-10-CM Diagnosis Code Q55.4Other congenital malformations of vas deferens, epididymis, seminal vesicles and prostate

ICD-10-CM Codes›Q00-Q99›Q50-Q56›Q55

ICD-10-CM Q55.4
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

Q55.4 is a billable ICD-10-CM diagnosis code for other congenital malformations of vas deferens, epididymis, seminal vesicles and prostate. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 729 through 730. 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
Q55.4
Billable Status
Yes — Valid for Submission
Code Describes
Other congenital malformations of vas deferens, epididymis, seminal vesicles and prostate
Short Description
Oth congen malform of vas def,epidid, semnl vescl & prostate
Parent Code
Q55
Other congenital malformations of male genital organs

Code Classification

ChapterQ00-Q99Congenital malformations, deformations and chromosomal abnormalities
SectionQ50-Q56Congenital malformations of genital organs
CategoryQ55Other congenital malformations of male genital organs
This CodeQ55.4Other congenital malformations of vas deferens, epididymis, seminal vesicles and prostate

Present on Admission (POA)Billing

Q55.4 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.

  • Agenesis of epididymis
  • Aplasia of spermatic cord
  • Congenital absence of epididymis
  • Congenital absence of prostate
  • Congenital absence of seminal vesicle
  • Congenital absence of spermatic cord
  • Congenital absence of vas deferens
  • Congenital anomaly of epididymis
  • Congenital anomaly of prostate
  • Congenital anomaly of spermatic cord
  • Congenital anomaly of vas deferens
  • Congenital aplasia of vas deferens
  • Congenital atresia of ejaculatory duct
  • Congenital bilateral aplasia of vas deferens
  • Congenital hypoplasia of epididymis
  • Congenital hypoplasia of testis and scrotum
  • Congenital hypoplasia of vas deferens
  • Congenital malposition of epididymis
  • Congenital malposition of vas deferens
  • Craggy epididymis
  • Cyst of hydatid of Morgagni
  • Cyst of mesonephric duct
  • Epididymis absent
  • Finding of appearance of epididymis
  • Hydatid cyst of Morgagni - male
  • Vas deferens absent
  • Wolffian duct cyst - male

Tabular List NotesGuidance

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

Inclusion Terms

  • Absence or aplasia of prostate
  • Absence or aplasia of spermatic cord
  • Congenital malformation of vas deferens, epididymis, seminal vesicles or prostate NOS

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.

    • Absence(of) (organ or part) (complete or partial)
      • ejaculatory duct (congenital)
    • Absence(of) (organ or part) (complete or partial)
      • epididymis (congenital)
    • Absence(of) (organ or part) (complete or partial)
      • prostate (acquired)
        • congenital
    • Absence(of) (organ or part) (complete or partial)
      • seminal vesicles (congenital)
    • Absence(of) (organ or part) (complete or partial)
      • spermatic cord, congenital
    • Absence(of) (organ or part) (complete or partial)
      • vas deferens (congenital)
    • Adhesions, adhesive(postinfective)
      • spermatic cord (acquired)
        • congenital
    • Agenesis
      • ejaculatory duct
    • Agenesis
      • prostate
    • Agenesis
      • seminal vesicles
    • Agenesis
      • spermatic cord
    • Agenesis
      • vas deferens
    • Anomaly, anomalous(congenital) (unspecified type)
      • ejaculatory duct
    • Anomaly, anomalous(congenital) (unspecified type)
      • epididymis
    • Anomaly, anomalous(congenital) (unspecified type)
      • hydatid of Morgagni
        • male (epididymal)
    • Anomaly, anomalous(congenital) (unspecified type)
      • prostate
    • Anomaly, anomalous(congenital) (unspecified type)
      • seminal vesicles
    • Anomaly, anomalous(congenital) (unspecified type)
      • spermatic cord
    • Anomaly, anomalous(congenital) (unspecified type)
      • vas deferens
    • Aplasia
      • prostate
    • Aplasia
      • spermatic cord
    • Appendage
      • epididymal (organ of Morgagni)
    • Appendix, appendicular
      • epididymis
    • Appendix, appendicular
      • Morgagni
        • male (epididymal)
    • Atresia, atretic
      • ejaculatory duct
    • Cyst(colloid) (mucous) (simple) (retention)
      • hydatid
        • Morgagni
          • male (epididymal)
    • Cyst(colloid) (mucous) (simple) (retention)
      • mesonephric duct
        • male
    • Cyst(colloid) (mucous) (simple) (retention)
      • Morgagni (hydatid)
        • male (epididymal)
    • Cyst(colloid) (mucous) (simple) (retention)
      • Müllerian duct
        • prostatic utricle
    • Cyst(colloid) (mucous) (simple) (retention)
      • wolffian
        • male
    • Deformity
      • ejaculatory duct (congenital)
    • Deformity
      • epididymis (congenital)
    • Deformity
      • prostate (congenital)
    • Deformity
      • seminal vesicles (congenital)
    • Deformity
      • spermatic cord (congenital)
    • Deformity
      • vas deferens (congenital)
    • Embryonic
      • vas deferens
    • Hydatid
      • Morgagni
        • male (epididymal)
    • Hypertrophy, hypertrophic
      • prostate
        • congenital
    • Hypoplasia, hypoplastic
      • epididymis (congenital)
    • Malformation(congenital)
      • epididymis
    • Malformation(congenital)
      • prostate
    • Malformation(congenital)
      • seminal vesicles
    • Malformation(congenital)
      • vas deferens
    • Morgagni's
      • cyst, organ, hydatid, or appendage
        • male (epididymal)
    • Spermatocele
      • congenital
    • Stricture
      • vas deferens
        • congenital

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

Testicular Disorders

Testicles, or testes, make male hormones and sperm. They are two egg-shaped organs inside the scrotum, the loose sac of skin behind the penis. It's easy to injure your testicles because they are not protected by bones or muscles. Men and boys should wear athletic supporters when they play sports.

Read the full article at MedlinePlus

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

Convert Q55.4 to ICD-9-CMHistory

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

ICD-9-CM
752.89 Genital organ 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 Q55.4Overview

Is Q55.4 (Other congenital malformations of male genital organs) a billable code?

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

What MS-DRG does Q55.4 group to?

When other congenital malformations of vas deferens, epididymis, seminal vesicles and prostate is the principal diagnosis on an inpatient stay, it groups to MS-DRG 729, 730, with relative weights from 0.6720 to 1.0587 depending on complications. Higher weights mean higher Medicare reimbursement.

Is Q55.4 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 vas deferens, epididymis, seminal vesicles and prostate on inpatient claims.

What is the ICD-9 equivalent of Q55.4?

Under the General Equivalence Mappings, other congenital malformations of vas deferens, epididymis, seminal vesicles and prostate converts to ICD-9-CM 752.89 (genital organ 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.