2026 ICD-10-CM Diagnosis Code Q28.8Other specified congenital malformations of circulatory system

ICD-10-CM Codes›Q00-Q99›Q20-Q28›Q28

ICD-10-CM Q28.8
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

Q28.8 is a billable ICD-10-CM diagnosis code for other specified congenital malformations of circulatory system. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 299 through 301. The code is exempt from POA reporting. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Cardiac and circulatory congenital anomalies.

Code Identity

ICD-10-CM Code
Q28.8
Billable Status
Yes — Valid for Submission
Code Describes
Other specified congenital malformations of circulatory system
Short Description
Oth congenital malformations of circulatory system
Parent Code
Q28
Other congenital malformations of circulatory system

Code Classification

ChapterQ00-Q99Congenital malformations, deformations and chromosomal abnormalities
SectionQ20-Q28Congenital malformations of the circulatory system
CategoryQ28Other congenital malformations of circulatory system
This CodeQ28.8Other specified congenital malformations of circulatory system

Present on Admission (POA)Billing

Q28.8 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.

  • Abnormality of arterial ligament
  • Absent venous duct
  • Absent venous duct with direct connection of umbilical vein to inferior caval vein
  • Absent venous duct with direct connection of umbilical vein to renal vein
  • Absent venous duct with direct connection of umbilical vein to right atrium
  • Agenesis of artery
  • Anomalous insertion of arterial ligament
  • Anomalous insertion of arterial ligament into distal left pulmonary artery
  • Anomalous insertion of arterial ligament into pulmonary trunk
  • Anomalous insertion of arterial ligament into right pulmonary artery
  • Anomalous origin of arterial ligament
  • Anomalous origin of arterial ligament from aortic arch
  • Anomalous origin of arterial ligament from aortic diverticulum
  • Anomalous origin of arterial ligament from ascending aorta
  • Anomalous origin of arterial ligament from distal descending aorta
  • Anomalous origin of arterial ligament from left brachiocephalic artery
  • Anomalous origin of arterial ligament from left carotid artery
  • Anomalous origin of arterial ligament from left subclavian artery
  • Anomalous origin of arterial ligament from retroesophageal aortic diverticulum
  • Anomalous origin of arterial ligament from right aortic arch
  • Anomalous origin of arterial ligament from right brachiocephalic artery
  • Anomalous origin of arterial ligament from right carotid artery
  • Anomalous origin of arterial ligament from right subclavian artery
  • Anomalous origin of arterial ligament from unknown site
  • Anomalous origin of right arterial ligament from left aortic arch
  • Anomalous origin of right arterial ligament from right aortic arch
  • Atresia of aortic arch with fibrous cord
  • Atresia of aortic arch with fibrous cord between left common carotid artery and right common carotid artery
  • Atresia of aortic arch with fibrous cord between subclavian artery and common carotid artery
  • Cardiovascular abnormality due to anomalous origin of arterial duct
  • Cardiovascular abnormality due to anomalous origin of coronary artery from pulmonary artery
  • Cardiovascular abnormality due to anomalous origin of coronary artery orifice
  • Cardiovascular abnormality due to bilateral arterial ducts
  • Closed ductus venosus
  • Congenital absence of ductus arteriosus
  • Congenital absence of pulmonary valve
  • Congenital anomaly of cardiovascular structure of trunk
  • Congenital anomaly of great vessel
  • Congenital anomaly of lymphatic structure of trunk
  • Congenital atresia of aortic arch
  • Congenital cardiovascular disorders during pregnancy, childbirth and the puerperium
  • Ductus venosus abnormality
  • Dural arteriovenous fistula
  • Heart disease in mother complicating pregnancy, childbirth AND/OR puerperium
  • Hypoplasia of spinal vessel
  • Patent ductus venosus
  • Pulmonary valve agenesis, tetralogy of Fallot, absence of ductus arteriosus syndrome
  • Right arterial ligament
  • Tetralogy of Fallot
  • Type I arteriovenous malformation of spinal cord
  • Type II arteriovenous malformation of spinal cord
  • Type III arteriovenous malformation of spinal cord
  • Type IV arteriovenous malformation of spinal cord
  • Venous anomaly of umbilical cord
  • Venous remnant
  • Venous-lymphatic malformation

Tabular List NotesGuidance

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

Inclusion Terms

  • Congenital aneurysm, specified site NEC
  • Spinal vessel anomaly

Type 2 Excludes

  • disorders of pyrophosphate metabolism E83.82

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)
      • ductus arteriosus
    • Agenesis
      • ductus arteriosus
    • Anomaly, anomalous(congenital) (unspecified type)
      • cardiovascular system
    • Pseudoarteriosus

Clinical ClassificationClinical

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

CCSR MAL001
Cardiac and circulatory congenital anomalies
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Tetralogy of Fallot

    a combination of congenital heart defects consisting of four key features including ventricular septal defects; pulmonary stenosis; right ventricular hypertrophy; and a dextro-positioned aorta. in this condition, blood from both ventricles (oxygen-rich and oxygen-poor) is pumped into the body often causing cyanosis.

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 Q28.8 to ICD-9-CMHistory

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

ICD-9-CM
747.89 Circulatory anomaly 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 Q28.8Overview

Is Q28.8 (Other congenital malformations of circulatory system) a billable code?

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

What MS-DRG does Q28.8 group to?

When other specified congenital malformations of circulatory system is the principal diagnosis on an inpatient stay, it groups to MS-DRG 299, 300, 301, with relative weights from 0.7197 to 1.6327 depending on complications. Higher weights mean higher Medicare reimbursement.

Is Q28.8 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 specified congenital malformations of circulatory system on inpatient claims.

What is the ICD-9 equivalent of Q28.8?

Under the General Equivalence Mappings, other specified congenital malformations of circulatory system converts to ICD-9-CM 747.89 (circulatory anomaly 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.