| Radioassay, Triiodothyronine Uptake | Federal registry | 1 |
| Radioassay, Vitamin B12 | Federal registry | 1 |
| Radioimmunoassay, Cholyglycine, Bile Acids | Federal registry | 1 |
| Radioimmunoassay, Estradiol | Federal registry | 1 |
| Radioimmunoassay, Follicle-Stimulating Hormone | Federal registry | 1 |
| Radioimmunoassay, Free Thyroxine | Federal registry | 1 |
| Radioimmunoassay, Luteinizing Hormone | Federal registry | 1 |
| Radioimmunoassay, Methaqualone | Federal registry | 1 |
| Radioimmunoassay, Progesterone | Federal registry | 1 |
| Radioimmunoassay, Prolactin (Lactogen) | Federal registry | 1 |
| Radioimmunoassay, Total Triiodothyronine | Federal registry | 1 |
| Radioimmunoassay, Tricyclic Antidepressant Drugs | Federal registry | 1 |
| Radioimmunoassay (Two-Site Solid Phase), Ferritin | Federal registry | 1 |
| Radioimmunoassay, Vancomycin | Federal registry | 1 |
| rails | Company website | 1 |
| Reagent, Leishmanii Serological | Federal registry | 1 |
| Reagent, Occult Blood | Federal registry | 1 |
| Reagents, 2019-Novel Coronavirus Nucleic Acid | Federal registry | 1 |
| Reagents, Zika Virus Nucleic Acid | Federal registry | 1 |
| Reamer | Federal registry | 1 |
| Refractometer For Clinical Use | Federal registry | 1 |
| Reprocessed Catheter Introducer | Federal registry | 1 |
| Reprocessed Intravascular Ultrasound Catheter | Federal registry | 1 |
| Residential Awnings | Company website | 1 |
| Resuscitator, Manual, Non Self-Inflating | Federal registry | 1 |
| Retinol-Binding Protein, Antigen, Antiserum, Control | Federal registry | 1 |
| Retractor, All Types | Federal registry | 1 |
| Retractor, Fiberoptic | Federal registry | 1 |
| Rongeur, Manual | Federal registry | 1 |
| Scalpel, One-Piece | Federal registry | 1 |
| Screwdriver, Surgical | Federal registry | 1 |
| Screw, Fixation, Bone | Federal registry | 1 |
| Sealant, Dural | Federal registry | 1 |
| Sealant, Pit And Fissure, And Conditioner | Federal registry | 1 |
| Sealant, Polymerizing | Federal registry | 1 |
| "Sea Salt" EN-1568 | Company website | 1 |
| Separator, Automated, Blood Cell And Plasma, Therapeutic | Federal registry | 1 |
| Separator, Automated, Blood Cell, Diagnostic | Federal registry | 1 |
| serial to ethernet | Company website | 1 |
| series | Company website | 1 |
| Set, Blood Transfusion | Federal registry | 1 |
| Set, Tubing, Blood, With And Without Anti-Regurgitation Valve | Federal registry | 1 |
| Shade Sails | Company website | 1 |
| Shield, Eye, Ophthalmic (Including Sunlamp Protective Eyewear And Post-Mydriatic Eyewear) | Federal registry | 1 |
| Shield, Eye, Radiological | Federal registry | 1 |
| Shockwave Intravascular Lithotripsy System | Federal registry | 1 |
| Single Use Only Blood Lancet With An Integral Sharps Injury Prevention Feature | Federal registry | 1 |
| Sleeve, Limb, Compressible | Federal registry | 1 |
| Solution-Test Standard-Conductivity, Dialysis | Federal registry | 1 |
| Somatic Gene Mutation Detection System | Federal registry | 1 |
