2027 ICD-10-CM Diagnosis Code Q28Other congenital malformations of circulatory system

ICD-10-CM Codes›Q00-Q99›Q20-Q28›Q28

ICD-10-CM Q28
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

Q28 is a non-billable ICD-10-CM category code for other congenital malformations of circulatory system, so it cannot be submitted on claims. Use a more specific code from this category instead, such as Q28.0, Q28.1, Q28.2, and Q28.3.

Code Identity

ICD-10-CM Code
Q28
Billable Status
No — Non-Billable Category
Code Describes
Other congenital malformations of circulatory system
Short Description
Other congenital malformations of circulatory system
Same as the full description in the CMS dataset.
Chapter
Q20-Q28
Congenital malformations of the 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 CodeQ28Other congenital malformations of circulatory system

Specific Coding for Other congenital malformations of circulatory systemOverview

Non-specific codes like Q28 require more characters. Use one of these billable codes instead:

  • Use Q28.0 for Arteriovenous malformation of precerebral vessels

  • Use Q28.1 for Other malformations of precerebral vessels

  • Use Q28.2 for Arteriovenous malformation of cerebral vessels

  • Use Q28.3 for Other malformations of cerebral vessels

  • Use Q28.8 for Other specified congenital malformations of circulatory system

  • Use Q28.9 for Congenital malformation of circulatory system, unspecified

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to Q28: its own notes plus those printed at Chapter 17. A note printed at a category, block or chapter applies to every code under it.

Excludes1

Not coded here: the excluded code is never reported together with this one, unless 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)

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

On Q28 itself
  • congenital peripheral aneurysm (Q27.8)
  • congenital pulmonary aneurysm (Q25.79)
  • congenital retinal aneurysm (Q14.1)
From Chapter 17 (Q00-QA1) Congenital malformations, deformations and chromosomal abnormalities applies to 900 codes
  • inborn errors of metabolism (E70-E88)

Notes

General instructions on how these codes are used.

From Chapter 17 (Q00-QA1) Congenital malformations, deformations and chromosomal abnormalities applies to 900 codes
  • Codes from this chapter are not for use on maternal records

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name Q28, its category, or a range that includes it.

Excludes1 1

These codes carry an Excludes1 note naming Q28: they are not reported together with it, unless the two conditions are unrelated.

  • I67.1 Cerebral aneurysm, nonruptured
    congenital cerebral aneurysm, nonruptured (Q28.-)

Patient EducationClinical

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Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About Q28Overview

What is the ICD-10 code for other congenital malformations of circulatory system?

Q28 is the ICD-10-CM category for other congenital malformations of circulatory system, but it is a non-billable header: claims need a more specific code from this category, listed on this page.

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

No. This is a category header that groups the codes for other congenital malformations of circulatory system, and headers cannot be submitted on claims. Claims for other congenital malformations of circulatory system need a more specific code from this category, such as Q28.0, Q28.1, and Q28.2.

Can Q28 be reported with Q27.8?

Not as a rule. The Excludes1 note on Q28 lists "congenital aneurysm NOS (Q27.8)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).