| Catheter, Eustachian, General & Plastic Surgery | Federal registry | 1 |
| Catheter, Ventricular | Federal registry | 1 |
| C. Difficile Toxin Gene Amplification Assay | Federal registry | 1 |
| Cement, Bone, Vertebroplasty | 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 |
| Clamp, Penile | Federal registry | 1 |
| Clamp, Rubber Dam | Federal registry | 1 |
| Cleaner, Denture, Mechanical | Federal registry | 1 |
| Cleanser, Denture, Over The Counter | Federal registry | 1 |
| Cleanser, Root Canal | Federal registry | 1 |
| Clip, Implantable | Federal registry | 1 |
| Clip, Removable (Skin) | Federal registry | 1 |
| Clip, Scalp | Federal registry | 1 |
| Coagulator-Cutter, Endoscopic, Unipolar (And Accessories) | Federal registry | 1 |
| Coating, Filling Material, Resin | Federal registry | 1 |
| Collections | Company website | 1 |
| Colorimeter, Photometer, Spectrophotometer For Clinical Use | Federal registry | 1 |
| Colorimetric Method, Gamma-Glutamyl Transpeptidase | 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 |
| Component, External, Limb, Ankle/Foot | Federal registry | 1 |
| Components, Exercise | Federal registry | 1 |
| Computer, Blood-Pressure | Federal registry | 1 |
| Condenser, Amalgam And Foil, Operative | Federal registry | 1 |
| Condensers, Microscope | Federal registry | 1 |
| Condom With Nonoxynol-9 | Federal registry | 1 |
| Connector, Ureteral Catheter | Federal registry | 1 |
| Consumables | Company website | 1 |
| Containers | Company website | 1 |
| Continence Care | Company website | 1 |
