2024 ICD-10-CM Diagnosis Code Q25.21

Interruption of aortic arch

ICD-10-CM Code:
ICD-10 Code for:
Interruption of aortic arch
Is Billable?
Yes - Valid for Submission
Chronic Condition Indicator: [1]
Code Navigator:

Code Classification

  • Congenital malformations, deformations and chromosomal abnormalities
    • Congenital malformations of the circulatory system
      • Congenital malformations of great arteries

Q25.21 is a billable diagnosis code used to specify a medical diagnosis of interruption of aortic arch. The code is valid during the current fiscal year for the submission of HIPAA-covered transactions from October 01, 2023 through September 30, 2024. The code is exempt from present on admission (POA) reporting for inpatient admissions to general acute care hospitals.

Approximate Synonyms

The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:

  • Abnormality within thorax due to interruption of aortic arch
  • Coarctation of aortic arch
  • Interrupted aortic arch
  • Interrupted aortic arch
  • Interrupted aortic arch
  • Interrupted aortic arch
  • Interrupted aortic arch between left common carotid and brachiocephalic artery
  • Interrupted aortic arch distal to left subclavian artery
  • Interruption of aortic arch between left common carotid artery and right common carotid artery
  • Interruption of aortic arch distal to subclavian artery
  • Postductal coarctation of aorta
  • Postductal interruption of aorta

Clinical Classification

Clinical Information

  • Interrupted Aortic Arch

    a rare congenital cardiovascular disorder characterized by the presence of a gap between the ascending and descending portions of the thoracic aorta. this disorder is often associated with ventricular septal defect, ductus arteriosus, or truncus arteriosus.

Tabular List of Diseases and Injuries

The following annotation back-references are applicable to this diagnosis code. The Tabular List of Diseases and Injuries is a list of ICD-10-CM codes, organized "head to toe" into chapters and sections with coding notes and guidance for inclusions, exclusions, descriptions and more.

Inclusion Terms

Inclusion Terms
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
  • Atresia of aortic arch

Index to Diseases and Injuries References

The following annotation back-references for this diagnosis code are found in the injuries and diseases index. The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10-CM code(s).

Present on Admission (POA)

Q25.21 is exempt from POA reporting - The Present on Admission (POA) indicator is used for diagnosis codes included in claims involving inpatient admissions to general acute care hospitals. POA indicators must be reported to CMS on each claim to facilitate the grouping of diagnoses codes into the proper Diagnostic Related Groups (DRG). CMS publishes a listing of specific diagnosis codes that are exempt from the POA reporting requirement. Review other POA exempt codes here.

CMS POA Indicator Options and Definitions

POA IndicatorReason for CodeCMS will pay the CC/MCC DRG?
YDiagnosis was present at time of inpatient admission.YES
NDiagnosis was not present at time of inpatient admission.NO
UDocumentation insufficient to determine if the condition was present at the time of inpatient admission.NO
WClinically undetermined - unable to clinically determine whether the condition was present at the time of inpatient admission.YES
1Unreported/Not used - Exempt from POA reporting. NO

Replacement Code

Q2521 replaces the following previously assigned ICD-10-CM code(s):

  • Q25.2 - Atresia of aorta

Convert Q25.21 to ICD-9-CM

  • ICD-9-CM Code: 747.11 - Interrupt of aortic arch

Code History

  • FY 2024 - No Change, effective from 10/1/2023 through 9/30/2024
  • FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
  • FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018


[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.