Q24.5 vs Q28
Q24.5 (Malformation of coronary vessels) compared with Q28 (Other congenital malformations of circulatory system), from the official CMS tabular data. Do not report these codes together: the official tabular list marks them Excludes1.
Can these codes be reported together?
No — do not report together. Q28 carries an Excludes1 note covering Q24.5: “congenital coronary aneurysm (Q24.5)”
Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
Side by side
| Q24.5Malformation of coronary vessels | Q28Other congenital malformations of circulatory system | |
|---|---|---|
| Billing status | Billable | Non-billable header |
| Classification | Q00-Q99 — Congenital Malformations, Deformations and Chromosomal Abnormalities (Q00-Q99) | Q00-Q99 — Congenital Malformations, Deformations and Chromosomal Abnormalities (Q00-Q99) |
| Definition | Malformation of coronary vessels is a billable ICD-10-CM diagnosis code (Q24.5). | Other congenital malformations of circulatory system is a non-billable ICD-10-CM category code (Q28). |
| Includes | Congenital coronary (artery) aneurysm | — |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources