ICD-10-CM 2027 diagnosis code
Q25.8Other congenital malformations of other great arteries
Q25.8 is a valid, billable ICD-10-CM code for other congenital malformations of other great arteries. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.
Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data
About Q25.8
Q25.8 is the ICD-10-CM diagnosis code for other congenital malformations of other great arteries. It belongs to category Q25 (congenital malformations of great arteries), block Q20-Q28 (congenital malformations of the circulatory system) and chapter 17 (congenital malformations, deformations, chromosomal abnormalities, and genetic disorders). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.
Within Q25, choose Q25.8 (Other congenital malformations of other great arteries) only when documentation doesn't support a more specific option: Patent ductus arteriosus (Q25.0), coarctation of aorta (Q25.1), atresia of aorta (Q25.2), Supravalvular aortic stenosis (Q25.3), other congenital malformations of aorta (Q25.4), atresia of pulmonary artery (Q25.5), stenosis of pulmonary artery (Q25.6), other congenital malformations of pulmonary artery (Q25.7) and 1 more.
As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.
In MS-DRG v44.0, it is part of the grouping logic for DRG 306 (Cardiac Congenital and Valvular Disorders with MCC, relative weight 1.546) and DRG 307 (Cardiac Congenital and Valvular Disorders without MCC, relative weight 0.9148), in MDC 05 (Diseases and Disorders of the Circulatory System), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
It is exempt from present-on-admission (POA) reporting, so no POA indicator is required.
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
Before ICD-10, this condition was coded in ICD-9-CM as 747.29 (other anomalies of aorta).
Notes that apply from higher levels
Instructions written at a parent level also apply to Q25.8.
Broader instructions also apply from Chapter 17: Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders.
Alphabetic index entries
4 entriesTerms in the official ICD-10-CM index that lead to Q25.8.
MS-DRG v44.0 grouping
All DRGs →Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.
MDC 05 · Diseases and Disorders of the Circulatory System
ICD-9-CM equivalent
Converter →- 747.29Other anomalies of aortaapproximate
From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
- No changes since FY2016.
Common questions about Q25.8
Is Q25.8 billable?
- Yes. Q25.8 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can Q25.8 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict Q25.8 as a principal diagnosis.
Is Q25.8 a CC or MCC?
- Q25.8 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.
What DRG does Q25.8 group to?
- Q25.8 is used in the MS-DRG v44.0 logic for MS-DRG 306 (Cardiac Congenital and Valvular Disorders with MCC) and MS-DRG 307 (Cardiac Congenital and Valvular Disorders without MCC). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.
What is the ICD-9 code for Q25.8?
- The CMS General Equivalence Mappings map Q25.8 to ICD-9-CM 747.29.