Skip to content
Dx

ICD-10-CM 2027 diagnosis code

Q28.8Other specified congenital malformations of circulatory system

✓ Billable / specificPOA exemptCC — complication/comorbidity

Q28.8 is a valid, billable ICD-10-CM code for other specified congenital malformations of circulatory system. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.Short description: Oth congenital malformations of circulatory system

Looking up by condition? See ICD-10 code for Pseudoarteriosus.

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 Q28.8

Q28.8 is the ICD-10-CM diagnosis code for other specified congenital malformations of circulatory system. It belongs to category Q28 (other congenital malformations of circulatory system), 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 Q28, choose Q28.8 (Other specified congenital malformations of circulatory system) only when documentation doesn't support a more specific option: arteriovenous malformation of precerebral vessels (Q28.0), other malformations of precerebral vessels (Q28.1), arteriovenous malformation of cerebral vessels (Q28.2), other malformations of cerebral vessels (Q28.3) and congenital malformation of circulatory system, unspecified (Q28.9).

The conditions in its Excludes2 note aren't part of Q28.8, but may be coded alongside it if the patient has both: disorders of pyrophosphate metabolism (E83.82-).

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 299 (Peripheral Vascular Disorders with MCC, relative weight 1.5842), DRG 300 (Peripheral Vascular Disorders with CC, relative weight 1.0464) and DRG 301 (Peripheral Vascular Disorders without CC/MCC, relative weight 0.7133), 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 747.89 (other specified anomalies of circulatory system).

Coding notes

Applicable toConditions and synonyms classified to this code
  • Congenital aneurysm, specified site NEC
  • Spinal vessel anomaly
Excludes2Not included here — may be reported together if both conditions exist
  • disorders of pyrophosphate metabolism (E83.82-)

Notes that apply from higher levels

Instructions written at a parent level also apply to Q28.8.

› From Q28 Other congenital malformations of circulatory system
Excludes1
  • congenital aneurysm NOS (Q27.8)
  • congenital coronary aneurysm (Q24.5)
  • ruptured cerebral arteriovenous malformation (I60.8)
  • ruptured malformation of precerebral vessels (I72.0)
Excludes2
  • congenital peripheral aneurysm (Q27.8)
  • congenital pulmonary aneurysm (Q25.79)
  • congenital retinal aneurysm (Q14.1)

Broader instructions also apply from Chapter 17: Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders.

Alphabetic index entries

4 entries

Terms in the official ICD-10-CM index that lead to Q28.8.

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.

ICD-9-CM equivalent

Converter →
  • 747.89Other specified anomalies of circulatory systemapproximate

From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about Q28.8

Is Q28.8 billable?

Yes. Q28.8 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can Q28.8 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict Q28.8 as a principal diagnosis.

Is Q28.8 a CC or MCC?

Q28.8 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.

What DRG does Q28.8 group to?

Q28.8 is used in the MS-DRG v44.0 logic for MS-DRG 299 (Peripheral Vascular Disorders with MCC), MS-DRG 300 (Peripheral Vascular Disorders with CC) and MS-DRG 301 (Peripheral Vascular Disorders without CC/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 Q28.8?

The CMS General Equivalence Mappings map Q28.8 to ICD-9-CM 747.89.