| Clamp, Eyelid, Ophthalmic | Federal registry | 1 |
| Clamp, Line | Federal registry | 1 |
| Clamp, Rubber Dam | Federal registry | 1 |
| Clamp, Surgical, General & Plastic Surgery | Federal registry | 1 |
| Clamp, Uterine | Federal registry | 1 |
| Cleanser, Denture, Over The Counter | Federal registry | 1 |
| Cleanser, Root Canal | Federal registry | 1 |
| Clinical Sample Concentrator | Federal registry | 1 |
| Clip, Nose | Federal registry | 1 |
| Clip, Scalp | Federal registry | 1 |
| Closure | Company website | 1 |
| Coagulator-Cutter, Endoscopic, Bipolar (And Accessories) | Federal registry | 1 |
| Coagulator-Cutter, Endoscopic, Unipolar (And Accessories) | Federal registry | 1 |
| Coating, Filling Material, Resin | Federal registry | 1 |
| Coatings | Company website | 1 |
| Coax | Company website | 1 |
| Coil, Magnetic Resonance, Specialty | Federal registry | 1 |
| Collagen Corneal Shield | Federal registry | 1 |
| Collector, Urine, Powered, Non Indwelling Catheter | Federal registry | 1 |
| Colorimeter, Photometer, Spectrophotometer For Clinical Use | Federal registry | 1 |
| Colorimetric Method, Triglycerides | Federal registry | 1 |
| Condenser, Heat And Moisture (Artificial Nose) | Federal registry | 1 |
| Confocal Optical Imaging | Federal registry | 1 |
| Connector, Blood Tubing, Infusion T | Federal registry | 1 |
| Connector, Catheter | Federal registry | 1 |
| CONSOLE | Company website | 1 |
| Container, Embedding | Federal registry | 1 |
| Container, Specimen, Sterile | Federal registry | 1 |
| Continuous Glucose Monitor Retrospective Data Analysis Software | Federal registry | 1 |
| Continuous Glucose Monitor Secondary Display | Federal registry | 1 |
| Contractor, Surgical | Federal registry | 1 |
| Controller, Foot, Handpiece And Cord | Federal registry | 1 |
| Control, Pump Speed, Cardiopulmonary Bypass | Federal registry | 1 |
| Controls | Company website | 1 |
| Control Systems | Company website | 1 |
| conventional machining | Company website | 1 |
| Cord, Retraction | Federal registry | 1 |
| Coronary Covered Stent | Federal registry | 1 |
| Coronary Drug-Eluting Stent | Federal registry | 1 |
| Coronary Mechanical Thrombectomy With Aspiration | Federal registry | 1 |
| Coronavirus Antigen Detection Test System. | Federal registry | 1 |
| Countersink | Federal registry | 1 |
| Cover, Burr Hole | Federal registry | 1 |
| Coverslips, Microscope Slide | Federal registry | 1 |
| Covid-19 Multi-Analyte Antigen Device | Federal registry | 1 |
| Culdoscope (And Accessories) | Federal registry | 1 |
| Cup, Menstrual | Federal registry | 1 |
| Curette, Adenoid | Federal registry | 1 |
| Curette, Ear | Federal registry | 1 |
| Curette, Nasal | Federal registry | 1 |
