I28.1 vs Q25.79
I28.1 (Aneurysm of pulmonary artery) compared with Q25.79 (Other congenital malformations of pulmonary artery), 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. I28.1 carries an Excludes1 note covering Q25.79: “congenital aneurysm (Q25.79)”
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
| I28.1Aneurysm of pulmonary artery | Q25.79Other congenital malformations of pulmonary artery | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | I00-I99 — Diseases of the Circulatory System (I00-I99) | Q00-Q99 — Congenital Malformations, Deformations and Chromosomal Abnormalities (Q00-Q99) |
| Definition | Aneurysm of pulmonary artery is a billable ICD-10-CM diagnosis code (I28.1). | Other congenital malformations of pulmonary artery is a billable ICD-10-CM diagnosis code (Q25.79). |
| Includes | — | Aberrant pulmonary artery Agenesis of pulmonary artery Congenital aneurysm of pulmonary artery Congenital anomaly of pulmonary artery |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources