| Radioimmunoassay, Acth | Federal registry | 2 |
| Radioimmunoassay, Calcitonin | Federal registry | 2 |
| Radioimmunoassay, Luteinizing Hormone | Federal registry | 2 |
| Radioimmunoassay, Parathyroid Hormone | Federal registry | 2 |
| Radioimmunoassay, Testosterones And Dihydrotestosterone | Federal registry | 2 |
| Radioimmunoassay, Thyroid-Stimulating Hormone | Federal registry | 2 |
| Radioimmunoassay, Tricyclic Antidepressant Drugs | Federal registry | 2 |
| Radioimmunoassay (Two-Site Solid Phase), Ferritin | Federal registry | 2 |
| Rasp, Surgical, General & Plastic Surgery | Federal registry | 2 |
| Razor, Surgical | Federal registry | 2 |
| Reagent, Occult Blood | Federal registry | 2 |
| Reagent, Rickettsia Serological | Federal registry | 2 |
| Real Time Nucleic Acid Amplification System | Federal registry | 2 |
| Reamer, Pulp Canal, Endodontic | Federal registry | 2 |
| Reduced- Montage Standard Electroencephalograph | Federal registry | 2 |
| Regulator, Pressure, Gas Cylinder | Federal registry | 2 |
| Remover, Crown | Federal registry | 2 |
| Resectoscope | Federal registry | 2 |
| Resectoscope, Working Element | Federal registry | 2 |
| Resin, Root Canal Filling | Federal registry | 2 |
| Restoration, Noble Metal | Federal registry | 2 |
| Restoration, Porcelain-Fused-To-Metal | Federal registry | 2 |
| Restraint, Protective | Federal registry | 2 |
| Retainer, Matrix | Federal registry | 2 |
| Retractor, Ent | Federal registry | 2 |
| Retractor, Fiberoptic | Federal registry | 2 |
| Retractor, Ophthalmic | Federal registry | 2 |
| Retractor, Self-Retaining, For Neurosurgery | Federal registry | 2 |
| Rongeur, Manual | Federal registry | 2 |
| Sacroiliac Joint Fixation | Federal registry | 2 |
| Saliva, Artificial | Federal registry | 2 |
| Scalpel, One-Piece | Federal registry | 2 |
| Scissors, Nasal | Federal registry | 2 |
| Scraper, Tongue | Federal registry | 2 |
| Screwdriver, Skullplate | Federal registry | 2 |
| Set, Tubing And Support, Ventilator (W Harness) | Federal registry | 2 |
| Source, Calibration, Sealed, Nuclear | Federal registry | 2 |
| Specula Accessories | Federal registry | 2 |
| Specula, Ophthalmic | Federal registry | 2 |
| Speculum, Vaginal, Metal | Federal registry | 2 |
| Spinal Vertebral Body Replacement Device | Federal registry | 2 |
| Spinous Process Plate | Federal registry | 2 |
| Splint, Nasal | Federal registry | 2 |
| Sponge, Ophthalmic | Federal registry | 2 |
| Stains, Hematology | Federal registry | 2 |
| Stand, Infusion | Federal registry | 2 |
| Staple, Fixation, Bone | Federal registry | 2 |
| Station, Pipetting And Diluting, For Clinical Use | Federal registry | 2 |
| Stent, Carotid | Federal registry | 2 |
| Stimulator, Muscle, Powered | Federal registry | 2 |