| ITN — Splint, Denis Brown | Class 1 / PM |
| ITO — Twister, Brace Setting | Class 1 / PM |
| ITQ — Joint, Knee, External Brace | Class 1 / PM |
| ITS — Joint, Hip, External Brace | Class 1 / PM |
| ITW — Joint, Ankle, External Brace | Class 1 / PM |
| ITX — Transducer, Ultrasonic, Diagnostic | Class 2 / RA |
| ITY — Assembly, Tube Housing, X-Ray, Diagnostic | Class 1 / RA |
| ITZ — Assembly, Tube Housing, X-Ray, Therapeutic | Class 2 / RA |
| IWA — Source, Wire, Iridium, Radioactive | Class 2 / RA |
| IWB — System, Radiation Therapy, Radionuclide | Class 2 / RA |
| IWD — Device, Beam Limiting, Teletherapy, Radionuclide | Class 2 / RA |
| IWE — Monitor, Patient Position, Light-Beam | Class 1 / RA |
| IWF — Needle, Isotope, Gold, Titanium, Platinum | Class 2 / RA |
| IWG — Seed, Isotope, Gold, Titanium, Platinum | Class 2 / RA |
| IWH — Source, Teletherapy, Radionuclide | Class 1 / RA |
| IWI — Source, Isotope, Sealed, Gold, Titanium, Platinum | Class 2 / RA |
| IWJ — System, Applicator, Radionuclide, Manual | Class 1 / RA |
| IWK — Cyclotron, Medical | Class 2 / RA |
| IWL — System, Radiation Therapy, Neutron, Medical | Class 2 / RA |
| IWM — Synchrotron, Medical | Class 2 / RA |
| IWN — Cassette, Measurement, Ardran-Crooks | Class 1 / RA |
| IWO — Apron, Protective | Class 1 / RA |
| IWP — Radiographic Protective Glove | Class 1 / RA |
| IWQ — Curtain, Protective, Radiographic | Class 1 / RA |
| IWR — Holder, Syringe, Lead | Class 1 / RA |
| IWS — Shield, Eye, Radiological | Class 1 / RA |
| IWT — Shield, Gonadal | Class 1 / RA |
| IWW — Shield, Vial | Class 1 / RA |
| IWX — Barrier, Control Panel, X-Ray, Movable | Class 1 / RA |
| IWY — Holder, Head, Radiographic | Class 1 / RA |
| IWZ — Film, Radiographic | Class 1 / RA |
| IXA — Cassette, Radiographic Film | Class 2 / RA |
| IXC — Illuminator, Radiographic-Film | Class 1 / RA |
| IXD — Source, Calibration, Sealed, Nuclear | Class 1 / RA |
| IXF — Test-Pattern, Radiographic | Class 1 / RA |
| IXG — Phantom, Anthropomorphic, Radiographic | Class 1 / RA |
| IXH — Camera, Focal Spot, Radiographic | Class 1 / RA |
| IXI — Block, Beam-Shaping, Radiation Therapy | Class 2 / RA |
| IXJ — Grid, Radiographic | Class 1 / RA |
| IXK — System, Imaging, X-Ray, Electrostatic | Class 2 / RA |
| IXL — Device, Spot-Film | Class 2 / RA |
| IXO — Synchronizer, Ecg / Respirator, Radiographic | Class 1 / RA |
| IXQ — Table, Radiographic, Stationary Top | Class 2 / RA |
| IXR — Table, Radiographic, Tilting | Class 2 / RA |
| IXW — Processor, Radiographic-Film, Automatic | Class 2 / RA |
| IXX — Processor, Cine Film | Class 2 / RA |
| IXY — Holder, Radiographic Cassette, Wall-Mounted | Class 1 / RA |
| IYB — Tube Mount, X-Ray, Diagnostic | Class 1 / RA |
| IYC — Generator, Orthovoltage, Therapeutic X-Ray | Class 2 / RA |
| IYD — Generator, Low Voltage, Therapeutic X-Ray | Class 2 / RA |