2026 ICD-10-CM Diagnosis Code Q28Other congenital malformations of circulatory system
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
Code Classification
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
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Type 1 Excludes
- congenital aneurysm NOS Q27.8
- congenital coronary aneurysm Q24.5
- ruptured cerebral arteriovenous malformation I60.8
- ruptured malformation of precerebral vessels I72.0
Type 2 Excludes
- congenital peripheral aneurysm Q27.8
- congenital pulmonary aneurysm Q25.79
- congenital retinal aneurysm Q14.1
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
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Code HistoryHistory
Questions About Q28Overview
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.
