| Catheter, Embolectomy | Federal registry | 1 |
| Catheter For Crossing Total Occlusions | Federal registry | 1 |
| Catheter, Hemodialysis, Implanted | Federal registry | 1 |
| Catheter, Intracardiac Mapping, High-Density Array | Federal registry | 1 |
| Catheter, Intracardiac Mapping, High-Density, Reprocessed | Federal registry | 1 |
| Catheter, Intravascular, Diagnostic | Federal registry | 1 |
| Catheter, Intravascular Occluding, Temporary | Federal registry | 1 |
| Catheter, Intravascular, Therapeutic, Long-Term Greater Than 30 Days | Federal registry | 1 |
| Catheter, Intravascular, Therapeutic, Short-Term Less Than 30 Days | Federal registry | 1 |
| Catheter Introducer Kit | 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 |
| Catheter, Peritoneal, Long-Term Indwelling | Federal registry | 1 |
| Catheter, Recording, Electrode, Reprocessed | Federal registry | 1 |
| Catheter, Septostomy | Federal registry | 1 |
| Catheters, Suction, Tracheobronchial | Federal registry | 1 |
| Catheter, Urethral | Federal registry | 1 |
| Catheter, Urological | Federal registry | 1 |
| Catheter, Ventricular | Federal registry | 1 |
| Cement, Dental | Federal registry | 1 |
| Cerclage, Fixation | Federal registry | 1 |
| Ceruloplasmin, Antigen, Antiserum, Control | Federal registry | 1 |
| Chamber, Hyperbaric | Federal registry | 1 |
| channel letters | Company website | 1 |
| Charger | Company website | 1 |
| Chisel, Surgical, Manual | Federal registry | 1 |
| Circulator, Breathing-Circuit | Federal registry | 1 |
| Clinical Sample Concentrator | Federal registry | 1 |
| Coating, Filling Material, Resin | Federal registry | 1 |
| Coil, Magnetic Resonance, Specialty | Federal registry | 1 |
| Collector, Urine, (And Accessories) For Indwelling Catheter | Federal registry | 1 |
| Colorimeter, Photometer, Spectrophotometer For Clinical Use | Federal registry | 1 |
| Colorimetric Method, Triglycerides | Federal registry | 1 |
| Colorimetry, Acetaminophen | Federal registry | 1 |
| Colorimetry, Salicylate | Federal registry | 1 |
| Complement C3, Antigen, Antiserum, Control | Federal registry | 1 |
| Complement C4, Antigen, Antiserum, Control | Federal registry | 1 |
| Component, External, Limb, Ankle/Foot | Federal registry | 1 |
| Component, Traction, Invasive | Federal registry | 1 |
| Computer, Blood-Pressure | Federal registry | 1 |
| Condom | Federal registry | 1 |
| Conductivity Rate, Urea Nitrogen | Federal registry | 1 |
| Consumables | Company website | 1 |
| Container, Specimen Mailer And Storage, Non-Sterile | Federal registry | 1 |
| Container, Specimen Mailer And Storage, Sterile | Federal registry | 1 |
| Container, Specimen, Sterile | Federal registry | 1 |
| Continuous Glucose Monitor Informed Insulin Dose Calculator | Federal registry | 1 |
| Control, Fecal Occult Blood | Federal registry | 1 |
| Counter, Differential Cell | Federal registry | 1 |
| Covid-19 Multi-Analyte Antigen Device | Federal registry | 1 |
