2026 ICD-10-CM Diagnosis Code Q79.59Other congenital malformations of abdominal wall

ICD-10-CM Codes›Q00-Q99›Q65-Q79›Q79

ICD-10-CM Q79.59
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

Q79.59 is a billable ICD-10-CM diagnosis code for other congenital malformations of abdominal wall. 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. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Musculoskeletal congenital conditions.

Code Identity

ICD-10-CM Code
Q79.59
Billable Status
Yes — Valid for Submission
Code Describes
Other congenital malformations of abdominal wall
Short Description
Other congenital malformations of abdominal wall
Same as the full description in the CMS dataset.
Parent Code
Q79.5
Other congenital malformations of abdominal wall

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 CodeQ79.59Other congenital malformations of abdominal wall

Present on Admission (POA)Billing

Q79.59 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 umbilical cord
  • Calcification of umbilical cord
  • Congenital hydrocephalus, low insertion of umbilicus syndrome
  • Congenital malformation of anterior abdominal wall
  • Congenital umbilical defect
  • Gastroschisis
  • Helical ulceration of umbilical cord
  • Hologastroschisis
  • Limb body wall complex
  • Linear umbilical cord disruption
  • Patent processus vaginalis

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.

    • Anomaly, anomalous(congenital) (unspecified type)
      • abdominal wall NEC
    • Defect, defective
      • abdominal wall, congenital
    • Deformity
      • abdominal wall
        • congenital
    • Diastasis
      • recti (abdomen)
        • congenital
    • Ectopic, ectopia(congenital)
      • abdominal viscera
        • due to defect in anterior abdominal wall

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

  • Gastroschisis

    a congenital defect with major fissure in the abdominal wall lateral to, but not at, the umbilicus. this results in the extrusion of viscera. unlike omphalocele, herniated structures in gastroschisis are not covered by a sac or peritoneum.

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 Q79.59 to ICD-9-CMHistory

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

ICD-9-CM
756.70 Congn anoml abd wall NOS
Approximate The match is approximate rather than exact.
ICD-9-CM
756.79 Congn anoml abd wall 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 Q79.59Overview

Is Q79.59 (Other congenital malformations of abdominal wall) a billable code?

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

What MS-DRG does Q79.59 group to?

When other congenital malformations of abdominal wall 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 Q79.59 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 abdominal wall on inpatient claims.

What is the ICD-9 equivalent of Q79.59?

Under the General Equivalence Mappings, other congenital malformations of abdominal wall converts to ICD-9-CM 756.70 (congn anoml abd wall NOS) and 756.79 (congn anoml abd wall 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.