| Catheter, Balloon Type | Federal registry | 1 |
| Catheter, Cannula And Tubing, Vascular, Cardiopulmonary Bypass | Federal registry | 1 |
| Catheter, Cholangiography | Federal registry | 1 |
| Catheter, Conduction, Anesthetic | Federal registry | 1 |
| Catheter, Electrode Recording, Or Probe, Electrode Recording | Federal registry | 1 |
| Catheter, Flow Directed | Federal registry | 1 |
| Catheter (Gastric, Colonic, Etc.), Irrigation And Aspiration | Federal registry | 1 |
| Catheter, Intravascular, Therapeutic, Short-Term Less Than 30 Days | Federal registry | 1 |
| Catheter, Oximeter, Fiber-Optic | Federal registry | 1 |
| Catheter, Pediatric, General & Plastic Surgery | Federal registry | 1 |
| Catheter, Percutaneous, Cardiac Ablation, For Treatment Of Atrial Fibrillation | Federal registry | 1 |
| Catheter, Percutaneous, Cardiac Ablation, For Treatment Of Atrial Flutter | Federal registry | 1 |
| Catheters, Suction, Tracheobronchial | Federal registry | 1 |
| C. Difficile Toxin Gene Amplification Assay | Federal registry | 1 |
| Cement, Bone, Vertebroplasty | Federal registry | 1 |
| Centrifuge, Hematocrit | Federal registry | 1 |
| Centrifuges (Micro, Ultra, Refrigerated) For Clinical Use | Federal registry | 1 |
| Ceruloplasmin, Antigen, Antiserum, Control | Federal registry | 1 |
| Chamber, Hyperbaric | Federal registry | 1 |
| Chamber, Oxygen, Topical, Extremity | Federal registry | 1 |
| Chart, Visual Acuity | Federal registry | 1 |
| Clamp | Federal registry | 1 |
| Clamp, Rubber Dam | Federal registry | 1 |
| Clamp, Wire, Orthodontic | Federal registry | 1 |
| Cleanser, Denture, Over The Counter | Federal registry | 1 |
| Cleanser, Root Canal | Federal registry | 1 |
| Closed Antineoplastic And Hazardous Drug Reconstitution And Transfer System | Federal registry | 1 |
| CNC MILLING | Company website | 1 |
| CNC TURNING | Company website | 1 |
| Coagulator-Cutter, Endoscopic, Unipolar (And Accessories) | 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 C3, Antigen, Antiserum, Control | Federal registry | 1 |
| Complement C4, Antigen, Antiserum, Control | Federal registry | 1 |
| Composite manufacturing | Stated by the owner | 1 |
| Computer, Diagnostic, Pre-Programmed, Single-Function | Federal registry | 1 |
| Conductivity Rate, Urea Nitrogen | Federal registry | 1 |
| Confocal Optical Imaging | Federal registry | 1 |
| Conformer, Ophthalmic | Federal registry | 1 |
| Contactors | Company website | 1 |
| Container, Liquid Medication, Graduated | Federal registry | 1 |
| Container, Specimen Mailer And Storage, Sterile | Federal registry | 1 |
| Container, Specimen Mailer And Storage, Temperature Controlled, Non-Sterile | Federal registry | 1 |
| Container, Specimen, Sterile | Federal registry | 1 |
| Continuous Glucose Monitor Retrospective Data Analysis Software | Federal registry | 1 |
| Control, Cell Counter, Normal And Abnormal | Federal registry | 1 |
| Control, Hemoglobin | Federal registry | 1 |
| Control, Hemoglobin, Abnormal | Federal registry | 1 |
