| Clamp, Penile | Federal registry | 1 |
| Clamp, Rubber Dam | Federal registry | 1 |
| Clamp, Umbilical | Federal registry | 1 |
| Cleaner, Denture, Mechanical | Federal registry | 1 |
| Cleanser, Denture, Over The Counter | Federal registry | 1 |
| Cleanser, Root Canal | Federal registry | 1 |
| Clinical Electronic Thermometer | Federal registry | 1 |
| Clip, Implantable | Federal registry | 1 |
| Clip, Removable (Skin) | Federal registry | 1 |
| Clip, Scalp | Federal registry | 1 |
| CNC Routing | Company website | 1 |
| Coagulator-Cutter, Endoscopic, Unipolar (And Accessories) | Federal registry | 1 |
| Coatings | Company website | 1 |
| Collector, Urine, (And Accessories) For Indwelling Catheter | Federal registry | 1 |
| Colonic Irrigation System | Federal registry | 1 |
| Colorimeter, Photometer, Spectrophotometer For Clinical Use | Federal registry | 1 |
| Colorimetric Method, Triglycerides | Federal registry | 1 |
| Colorimetry, Acetaminophen | Federal registry | 1 |
| Colorimetry, Cholinesterase | Federal registry | 1 |
| Colorimetry, Salicylate | Federal registry | 1 |
| Complement C1q, Antigen, Antiserum, Control | Federal registry | 1 |
| Complement C3, Antigen, Antiserum, Control | Federal registry | 1 |
| Complement C4, Antigen, Antiserum, Control | Federal registry | 1 |
| Complex Assemblies | Company website | 1 |
| Computer, Blood-Pressure | Federal registry | 1 |
| Condenser, Amalgam And Foil, Operative | Federal registry | 1 |
| Condensers, Microscope | Federal registry | 1 |
| Condom | Federal registry | 1 |
| Condom, Synthetic | Federal registry | 1 |
| connectors | Company website | 1 |
| Consumables | Company website | 1 |
| Containers | Company website | 1 |
| Container, Sharps | Federal registry | 1 |
| Contract Manufacturing | Company website | 1 |
| Contractor, Surgical | Federal registry | 1 |
| Control, Cell Counter, Normal And Abnormal | Federal registry | 1 |
| Control, Plasma, Abnormal | Federal registry | 1 |
| Controls For Blood-Gases, (Assayed And Unassayed) | Federal registry | 1 |
| copper assemblies | Company website | 1 |
| Cotton, Roll | Federal registry | 1 |
| Counter, Cell, Automated (Particle Counter) | Federal registry | 1 |
| Covid-19 Multi-Analyte Respiratory Panel Nucleic Acid Devices | Federal registry | 1 |
| Cream For X-Ray Attenuation | Federal registry | 1 |
| Cresolphthalein Complexone, Calcium | Federal registry | 1 |
| Crown, Preformed | Federal registry | 1 |
| Culture-Based Short-Term Incubation Antimicrobial Resistance Assay | Federal registry | 1 |
| Curette, Adenoid | Federal registry | 1 |
| Curette, Endodontic | Federal registry | 1 |
| Curette, Periodontic | Federal registry | 1 |
| Curette, Suction, Endometrial (And Accessories) | Federal registry | 1 |
