| CNC TURNING | Company website | 1 |
| Coatings | Company website | 1 |
| Colonoscope And Accessories, Flexible/Rigid | Federal registry | 1 |
| Colorimeter, Photometer, Spectrophotometer For Clinical Use | Federal registry | 1 |
| Colorimetric Method, Triglycerides | Federal registry | 1 |
| Colorimetry, Acetaminophen | Federal registry | 1 |
| Columns | Company website | 1 |
| Console, Heart-Lung Machine, Cardiopulmonary Bypass | Federal registry | 1 |
| Consumables | Company website | 1 |
| Continuous Glucose Monitor Retrospective Data Analysis Software | Federal registry | 1 |
| Continuous Glucose Monitor Secondary Display | Federal registry | 1 |
| Continuous Measurement Thermometer | Federal registry | 1 |
| Control, Pump Speed, Cardiopulmonary Bypass | Federal registry | 1 |
| Coronary Mechanical Thrombectomy With Aspiration | Federal registry | 1 |
| Counter, Differential Cell | Federal registry | 1 |
| Coverslips, Microscope Slide | Federal registry | 1 |
| Cuff, Nerve | Federal registry | 1 |
| Curette, Ophthalmic | Federal registry | 1 |
| custom formulations | Company website | 1 |
| Cutter, Surgical | Federal registry | 1 |
| Cyclosporine | Federal registry | 1 |
| Device, Anti-Snoring | Federal registry | 1 |
| Device, Jaw Repositioning | Federal registry | 1 |
| Devices, Breath Trapping, Alcohol | Federal registry | 1 |
| Devices, Measure, Antibodies To Glomerular Basement Membrane (Gbm) | Federal registry | 1 |
| Device, Thermal Ablation, Endometrial | Federal registry | 1 |
| Diagnostic Software, K-Nearest Neighbor Algorithm, Autoimmune Disease | Federal registry | 1 |
| Diazo Colorimetry, Bilirubin | Federal registry | 1 |
| Dilator, Catheter | Federal registry | 1 |
| Dilator, Nasal | Federal registry | 1 |
| direct view led | Company website | 1 |
| Dispenser, Liquid Medication | Federal registry | 1 |
| Dissector, Surgical, General & Plastic Surgery | Federal registry | 1 |
| Dressing, Wound, Drug | Federal registry | 1 |
| Driver, Prosthesis | Federal registry | 1 |
| Droplet Digital Pcr System | Federal registry | 1 |
| Drug-Eluting Sinus Stent | Federal registry | 1 |
| Drug Mixture Control Materials | Federal registry | 1 |
| Electrode, Ion Specific, Potassium | Federal registry | 1 |
| Electrode, Ion Specific, Sodium | Federal registry | 1 |
| Electronics Manufacturing | Company website | 1 |
| Endoscope, Neurological | Federal registry | 1 |
| Enteral Administration Kit (Adult & Pediatric) | Federal registry | 1 |
| Enzymatic, Carbon-Dioxide | Federal registry | 1 |
| Enzymatic Esterase--Oxidase, Cholesterol | Federal registry | 1 |
| Enzymatic Method, Alcohol Dehydrogenase, Ultraviolet | Federal registry | 1 |
| Enzyme Immunoassay, Carbamazepine | Federal registry | 1 |
| Enzyme Immunoassay, Digitoxin | Federal registry | 1 |
| Enzyme Immunoassay, Digoxin | Federal registry | 1 |
| Enzyme Immunoassay, Diphenylhydantoin | Federal registry | 1 |
