| Value | Code Name | Code | Code System | Code Description |
|---|---|---|---|---|
| 1 | irregularity or banding with no stenosis | irregularity or banding with no stenosis | ||
| 2 | stenosis, <50% reduction in diameter | stenosis, <50% reduction in diameter | ||
| 3 | stenosis, >50% reduction in diameter | stenosis, >50% reduction in diameter | ||
| 4 | occlusion | occlusion | ||
| 0 | no involvement | no involvement |