| MEVION S250-FIT Proton Therapy System | 00864366000117 | Mevion Medical Systems, Inc. | Class IIb | |
| MEVION S250-FIT Proton Therapy System | 00864366000148 | Mevion Medical Systems, Inc. | Class IIb | |
| Mevion S250i | 00864366000124 | Mevion Medical Systems, Inc. | Class IIb | |
| ProBeam 360° Proton Therapy System - Rotating Gantry | 00858991006194 | Varian Medical Systems Particle Therapy GmbH & Co. KG | Class IIb | |
| ProBeam 360° Proton Theray System - Rotating Gantry | 00858991006088 | Varian Medical Systems Particle Therapy GmbH & Co. KG | Class IIb | |
| ProBeam 360° Proton Theray System - Rotating Gantry 1.0 | 00858991006071 | Varian Medical Systems Particle Therapy GmbH & Co. KG | Class IIb | |
| ProBeam Proton Therapy System - Eye Treatment Room | 00858991006125 | Varian Medical Systems Particle Therapy GmbH & Co. KG | Class IIb | |
| ProBeam Proton Therapy System - Eye Treatment Room | 00858991006156 | Varian Medical Systems Particle Therapy GmbH & Co. KG | Class IIb | |
| ProBeam Proton Therapy System - Fixed Beam Room | 00858991006149 | Varian Medical Systems Particle Therapy GmbH & Co. KG | Class IIb | |
| ProBeam® Proton Therapy System Fixed Beam Room 4.3 | 00858991006064 | Varian Medical Systems Particle Therapy GmbH & Co. KG | Class IIb | |
| ProBeam Proton Therapy System - Rotating Gantry | 00858991006118 | Varian Medical Systems Particle Therapy GmbH & Co. KG | Class IIb | |
| ProBeam Proton Therapy System - Rotating Gantry | 00858991006132 | Varian Medical Systems Particle Therapy GmbH & Co. KG | Class IIb | |
| ProBeam® Proton Therapy System Rotating Gantry 4.3 | 00858991006057 | Varian Medical Systems Particle Therapy GmbH & Co. KG | Class IIb | |
| ProteusONE | 05404013804016 | Ion Beam Applications S.A. | Class IIb | |
| ProteusPLUS | 05404013803019 | Ion Beam Applications S.A. | Class IIb | |
| Proton Therapy Combined System | 05404013851010 | Ion Beam Applications SA | Class IIb | |
| Proton Therapy System | 04560333350174 | Hitachi High-Tech Corporation | Class IIb | |
UDI Compass