2026 ICD-10-CM Diagnosis Code Q79.4Prune belly syndrome

ICD-10-CM Codes›Q00-Q99›Q65-Q79›Q79

ICD-10-CM Q79.4
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

Q79.4 is a billable ICD-10-CM diagnosis code for prune belly syndrome. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 393 through 395. The code is exempt from POA reporting. Coders also document this condition as congenital absence of abdominal muscle. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Musculoskeletal congenital conditions.

Code Identity

ICD-10-CM Code
Q79.4
Billable Status
Yes — Valid for Submission
Code Describes
Prune belly syndrome
Short Description
Prune belly syndrome
Same as the full description in the CMS dataset.
Parent Code
Q79
Congenital malformations of musculoskeletal system, not elsewhere classified

Code Classification

ChapterQ00-Q99Congenital malformations, deformations and chromosomal abnormalities
SectionQ65-Q79Congenital malformations and deformations of the musculoskeletal system
CategoryQ79Congenital malformations of musculoskeletal system, not elsewhere classified
This CodeQ79.4Prune belly syndrome

Present on Admission (POA)Billing

Q79.4 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.

  • Congenital absence of abdominal muscle
  • Congenital prolapse of mucous membrane of urinary bladder
  • Congenital prolapse of urinary bladder
  • Hypogonadism with prune belly syndrome
  • Prune belly syndrome
  • Prune belly syndrome with pulmonic stenosis, intellectual disability and deafness

Tabular List NotesGuidance

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

Inclusion Terms

  • Congenital prolapse of bladder mucosa
  • Eagle-Barrett syndrome

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.

    • Abdomen, abdominal
      • muscle deficiency syndrome
    • Aplasia
      • abdominal muscle syndrome
    • Deficiency, deficient
      • abdominal muscle syndrome
    • Prolapse, prolapsed
      • bladder (mucosa) (sphincter) (acquired)
        • congenital
    • Prune belly(syndrome)
    • Syndrome
      • abdominal
        • muscle deficiency
    • Syndrome
      • Eagle-Barrett
    • Syndrome
      • prune belly

Clinical ClassificationClinical

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

CCSR MAL008
Musculoskeletal congenital conditions
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Prune Belly Syndrome

    a syndrome characterized by abdominal wall musculature deficiency, cryptorchism, and urinary tract abnormalities. the syndrome derives its name from its characteristic distended abdomen with wrinkled skin.

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 Q79.4 to ICD-9-CMHistory

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

ICD-9-CM
756.71 Prune belly syndrome
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 Q79.4Overview

Is Q79.4 a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report prune belly syndrome on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does Q79.4 group to?

When prune belly syndrome is the principal diagnosis on an inpatient stay, it groups to MS-DRG 393, 394, 395, with relative weights from 0.6490 to 1.5993 depending on complications. Higher weights mean higher Medicare reimbursement.

Is Q79.4 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 prune belly syndrome on inpatient claims.

What is the ICD-9 equivalent of Q79.4?

Under the General Equivalence Mappings, prune belly syndrome converts to ICD-9-CM 756.71 (prune belly syndrome). 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.