| Value | Code Name | Code | Code System | Code Description |
|---|---|---|---|---|
| C1 cervical | C1 cervical | C1 cervical | ||
| C2 petrous | C2 petrous | C2 petrous | ||
| C3 lacerum | C3 lacerum | C3 lacerum | ||
| C4 cavernous | C4 cavernous | C4 cavernous | ||
| C5 clinoidal | C5 clinoidal | C5 clinoidal | ||
| C6 - ophthalmic to PCOM | C6 - ophthalmic to PCOM | C6 - ophthalmic to PCOM | ||
| C6 - PCOM to terminus | C6 - PCOM to terminus | C6 - PCOM to terminus | ||
| A1 | A1 | A1 | ||
| A2 | A2 | A2 | ||
| M1 proximal to striate | M1 proximal to striate | M1 proximal to striate | ||
| M1 distal to striate | M1 distal to striate | M1 distal to striate | ||
| Vertebral origin | Vertebral origin | Vertebral origin | ||
| Vertebral- cervical | Vertebral- cervical | Vertebral- cervical | ||
| Vertebral-intracranial proximal to PICA | Vertebral-intracranial proximal to PICA | Vertebral-intracranial proximal to PICA | ||
| Vertebral-distal to PICA | Vertebral-distal to PICA | Vertebral-distal to PICA | ||
| Basilar-distal to AICA | Basilar-distal to AICA | Basilar-distal to AICA | ||
| Basilar-mid | Basilar-mid | Basilar-mid | ||
| Basilar-proximal to AICA | Basilar-proximal to AICA | Basilar-proximal to AICA | ||
| PCOM | PCOM | PCOM | ||
| P1 | P1 | P1 | ||
| P2 | P2 | P2 | ||
| P3 | P3 | P3 | ||
| SCA | SCA | SCA | ||
| AICA | AICA | AICA | ||
| PICA | PICA | PICA | ||
| ACOM | ACOM | ACOM | ||
| M2 | M2 | M2 | ||
| M3 | M3 | M3 | ||
| M4 | M4 | M4 | ||
| CCA origin | CCA origin | Common carotid artery origin | ||
| CCA to bifurcation | CCA to bifurcation | Common carotid artery to bifurcation | ||
| ICA at origin | ICA at origin | Internal carotid artery at origin | ||
| M2 single | M2 single | M2 single | ||
| M2 multiple | M2 multiple | M2 multiple | ||
| M3 single | M3 single | M3 single | ||
| M3 multiple | M3 multiple | M3 multiple | ||
| M4 single | M4 single | M4 single | ||
| M4 multiple | M4 multiple | M4 multiple | ||
| Basilar-distal | Basilar-distal | Basilar-distal | ||
| Basilar-proximal | Basilar-proximal | Basilar-proximal |