| Calibrator, Dose, Radionuclide | Federal registry | 1 |
| Calibrator For Cell Indices | Federal registry | 1 |
| Calibrator For Hemoglobin And Hematocrit Measurement | Federal registry | 1 |
| Calibrator For Platelet Counting | Federal registry | 1 |
| Calibrator For Red-Cell And White-Cell Counting | Federal registry | 1 |
| Calibrators, Drug Mixture | Federal registry | 1 |
| Calibrators, Drug Specific | Federal registry | 1 |
| Calibrators, Ethyl Alcohol | Federal registry | 1 |
| Camera, Ophthalmic, Ac-Powered | Federal registry | 1 |
| Camera, Surgical And Accessories | Federal registry | 1 |
| Camera, Television, Endoscopic, With Audio | Federal registry | 1 |
| Camera, Television, Endoscopic, Without Audio | Federal registry | 1 |
| Camera, Television, Surgical, With Audio | Federal registry | 1 |
| Cannula, Catheter | Federal registry | 1 |
| Cannula, Ear | Federal registry | 1 |
| Cannula, Ophthalmic | Federal registry | 1 |
| Cannula, Sinus | Federal registry | 1 |
| Cannula, Ventricular | Federal registry | 1 |
| Cap, Surgical | Federal registry | 1 |
| Carbol Fuchsin | Federal registry | 1 |
| Carbon Dioxide | Company website | 1 |
| Cardiac C-Reactive Protein, Antigen, Antiserum, And Control | Federal registry | 1 |
| Carrier, Amalgam, Operative | Federal registry | 1 |
| Carrier, Ligature | Federal registry | 1 |
| Carver, Dental Amalgam, Operative | Federal registry | 1 |
| Case, Contact Lens | Federal registry | 1 |
| Catheter And Tube, Suprapubic | Federal registry | 1 |
| Catheter, Cannula And Tubing, Vascular, Cardiopulmonary Bypass | Federal registry | 1 |
| Catheter, Conduction, Anesthetic | Federal registry | 1 |
| Catheter, Eustachian, General & Plastic Surgery | Federal registry | 1 |
| Catheter, Intravascular, Therapeutic, Short-Term Less Than 30 Days | Federal registry | 1 |
| Catheter, Irrigation | Federal registry | 1 |
| Catheter, Ventricular | Federal registry | 1 |
| C. Difficile Toxin Gene Amplification Assay | Federal registry | 1 |
| Cement Obturator | Federal registry | 1 |
| centrifugal fans | Company website | 1 |
| Centrifuge, Cell-Washing, Automated For Immuno-Hematology | Federal registry | 1 |
| Chair And Table, Medical | Federal registry | 1 |
| Chair, Ophthalmic, Ac-Powered | Federal registry | 1 |
| Chair, Ophthalmic, Manual | Federal registry | 1 |
| Chamber, Slide Culture | Federal registry | 1 |
| Chart, Visual Acuity | Federal registry | 1 |
| Chisel, Mastoid | Federal registry | 1 |
| Chisel, Middle-Ear | Federal registry | 1 |
| Chisel, Nasal | Federal registry | 1 |
| Chisel, Osteotome, Surgical | Federal registry | 1 |
| Chromatographic Separation, Cpk Isoenzymes | Federal registry | 1 |
| Clamp, Cannula | Federal registry | 1 |
| Clamp, Non-Electrical | Federal registry | 1 |
| Clamp, Ossicle Holding | Federal registry | 1 |
