| Radioassay, Intrinsic Factor Blocking Antibody | Federal registry | 1 |
| Radioimmunoassay, Aldosterone | Federal registry | 1 |
| Radioimmunoassay, Androstenedione | Federal registry | 1 |
| Radioimmunoassay, Calcitonin | Federal registry | 1 |
| Radioimmunoassay, Cortisol | Federal registry | 1 |
| Radioimmunoassay, Dehydroepiandrosterone (Free And Sulfate) | Federal registry | 1 |
| Radioimmunoassay, Estriol | Federal registry | 1 |
| Radioimmunoassay, Follicle-Stimulating Hormone | Federal registry | 1 |
| Radioimmunoassay, Free Thyroxine | Federal registry | 1 |
| Radioimmunoassay, Human Growth Hormone | Federal registry | 1 |
| Radioimmunoassay, Immunoreactive Insulin | Federal registry | 1 |
| Radioimmunoassay, Luteinizing Hormone | Federal registry | 1 |
| Radioimmunoassay, Prolactin (Lactogen) | Federal registry | 1 |
| Radioimmunoassay, Thyroid-Stimulating Hormone | Federal registry | 1 |
| Radioimmunoassay, Thyroxine-Binding Globulin | Federal registry | 1 |
| Radioimmunoassay, Total Triiodothyronine | Federal registry | 1 |
| Radioimmunoassay (Two-Site Solid Phase), Ferritin | Federal registry | 1 |
| Razor, Surgical | Federal registry | 1 |
| Reagent, Borrelia Serological Reagent | Federal registry | 1 |
| Reagent, Coronavirus Serological | Federal registry | 1 |
| Reagent, Occult Blood | Federal registry | 1 |
| Reagents, Specific, Analyte | Federal registry | 1 |
| Recorder, Event, Implantable Cardiac, (With Arrhythmia Detection) | Federal registry | 1 |
| Refractometer For Clinical Use | Federal registry | 1 |
| Regulator, Pressure, Gas Cylinder | Federal registry | 1 |
| Reminder, Medication | Federal registry | 1 |
| Rental | Company website | 1 |
| Reprocessed Intravascular Ultrasound Catheter | Federal registry | 1 |
| Research and Development | Company website | 1 |
| Research Use Only/Clinical Chemistry Devices | Federal registry | 1 |
| Research Use Only/Immunology Devices | Federal registry | 1 |
| Respirator, Surgical | Federal registry | 1 |
| Restraint, Protective | Federal registry | 1 |
| Retainer, Matrix | Federal registry | 1 |
| Ring, Teething, Non-Fluid Filled | Federal registry | 1 |
| Ring (Wound Protector), Drape Retention, Internal | Federal registry | 1 |
| Rongeur | Federal registry | 1 |
| Saw | Federal registry | 1 |
| Scale, Patient | Federal registry | 1 |
| Scaler, Ultrasonic | Federal registry | 1 |
| Scalpel, One-Piece | Federal registry | 1 |
| Scissors, Collar And Crown | Federal registry | 1 |
| Scissors, General, Surgical | Federal registry | 1 |
| Scissors, Medical, Disposable | Federal registry | 1 |
| Scissors, Orthopedic, Surgical | Federal registry | 1 |
| Screen, Leaded, Operator Radiation Protector | Federal registry | 1 |
| SD-179 Temperature Sensor | Company website | 1 |
| Sealant, Pit And Fissure, And Conditioner | Federal registry | 1 |
| Securement Wound Dressing For Reduction Of Infection | Federal registry | 1 |
| Self-Fitting Air-Conduction Hearing Aid, Prescription | Federal registry | 1 |
