Q27 vs Q28.0
Q27 (Other congenital malformations of peripheral vascular system) compared with Q28.0 (Arteriovenous malformation of precerebral vessels), from the official CMS tabular data. Both may be reported when both conditions are documented (Excludes2).
Can these codes be reported together?
Yes, when both are documented. Q27 carries an Excludes2 note covering Q28.0: “anomalies of cerebral and precerebral vessels (Q28.0-Q28.3)”
Excludes2 marks distinct conditions — both may be reported when both are documented.
Side by side
| Q27Other congenital malformations of peripheral vascular system | Q28.0Arteriovenous malformation of precerebral vessels | |
|---|---|---|
| Billing status | Non-billable header | Billable |
| Classification | Q00-Q99 — Congenital Malformations, Deformations and Chromosomal Abnormalities (Q00-Q99) | Q00-Q99 — Congenital Malformations, Deformations and Chromosomal Abnormalities (Q00-Q99) |
| Definition | Other congenital malformations of peripheral vascular system is a non-billable ICD-10-CM category code (Q27). | Arteriovenous malformation of precerebral vessels is a billable ICD-10-CM diagnosis code (Q28.0). |
| Includes | — | Congenital arteriovenous precerebral aneurysm (nonruptured) |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources