Coding and coverage · ICD-10-CM

Q28 Other congenital malformations of circulatory system

Not billable (header)Chapter 17

Report one of the more specific codes below.

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Codes under this one

  • Q28.0 Arteriovenous malformation of precerebral vessels
  • Q28.1 Other malformations of precerebral vessels
  • Q28.2 Arteriovenous malformation of cerebral vessels
  • Q28.3 Other malformations of cerebral vessels
  • Q28.8 Other specified congenital malformations of circulatory system
  • Q28.9 Congenital malformation of circulatory system, unspecified

Instructional notes

Chapter 17

Excludes2Not included here: the patient may have both; report both when both are present.
  • inborn errors of metabolism (E70-E88)
Notes
  • Codes from this chapter are not for use on maternal records

This code

Excludes1Not coded here: never report with this code, except when the two conditions are unrelated.
  • congenital aneurysm NOS (Q27.8)
  • congenital coronary aneurysm (Q24.5)
  • ruptured cerebral arteriovenous malformation (I60.8)
  • ruptured malformation of precerebral vessels (I72.0)
Excludes2Not included here: the patient may have both; report both when both are present.
  • congenital peripheral aneurysm (Q27.8)
  • congenital pulmonary aneurysm (Q25.79)
  • congenital retinal aneurysm (Q14.1)

Chapter 17: Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders (Q00-QA1) · Q20-Q28 Congenital malformations of the circulatory system (Q20-Q28)

Source: ICD-10-CM FY 2027 code descriptions and tabular list (CMS and CDC National Center for Health Statistics), effective 2026-10-01 through 2027-09-30 · CMS ICD-10 files. HCC mapping: CMS-HCC V28, payment year 2027. As of 2026-11-04.

Coverage and payment depend on the claim details; confirm with the Medicare Administrative Contractor.