| W88 | Exposure to ionizing radiation | NON-BILLABLE CODE |
| W88.0 | Exposure to X-rays | NON-BILLABLE CODE |
| W88.0XXA | Exposure to X-rays, initial encounter | BILLABLE CODE |
| W88.0XXD | Exposure to X-rays, subsequent encounter | BILLABLE CODE |
| W88.0XXS | Exposure to X-rays, sequela | BILLABLE CODE |
| W88.1 | Exposure to radioactive isotopes | NON-BILLABLE CODE |
| W88.1XXA | Exposure to radioactive isotopes, initial encounter | BILLABLE CODE |
| W88.1XXD | Exposure to radioactive isotopes, subsequent encounter | BILLABLE CODE |
| W88.1XXS | Exposure to radioactive isotopes, sequela | BILLABLE CODE |
| W88.8 | Exposure to other ionizing radiation | NON-BILLABLE CODE |
| W88.8XXD | Exposure to other ionizing radiation, subsequent encounter | BILLABLE CODE |
| W88.8XXS | Exposure to other ionizing radiation, sequela | BILLABLE CODE |
