| Neurosurgical Nerve Locator | Federal registry | 1 |
| Nitrophenylphosphate, Alkaline Phosphatase Or Isoenzymes | Federal registry | 1 |
| Non-Normalizing Quantitative Electroencephalograph Software | Federal registry | 1 |
| Non-Sars Coronavirus Multiplex Nucleic Acid Assay | Federal registry | 1 |
| Normothermic Machine Perfusion System For The Preservation Of Donor Livers Prior To Transplantation | Federal registry | 1 |
| Normothermic Machine Perfusion System For The Preservation Of Standard Criteria Donor Lungs Prior To Transplantation | Federal registry | 1 |
| Normothermic Preservation System For Transplantation Of Initially Unacceptable Donor Lungs | Federal registry | 1 |
| Occluder, Catheter Tip | Federal registry | 1 |
| optical assemblies | Company website | 1 |
| Optical Coherence Tomography, Intravascular Catheter | Federal registry | 1 |
| Orange G | Federal registry | 1 |
| Organ Care System (Ocs) Heart System | Federal registry | 1 |
| Orthodontic Software | Federal registry | 1 |
| Orthosis, Cranial, Laser Scan | Federal registry | 1 |
| Orthosis, Foot Drop | Federal registry | 1 |
| Orthosis, Lumbo-Sacral | Federal registry | 1 |
| Orthosis, Sacroiliac, Soft | Federal registry | 1 |
| Orthosis, Truncal/Orthosis, Limb | Federal registry | 1 |
| Osteotome | Federal registry | 1 |
| Over-The-Counter Covid-19 Antigen Test | Federal registry | 1 |
| Oximeter To Measure Hemoglobin | Federal registry | 1 |
| Oxygenator, Cardiopulmonary Bypass | Federal registry | 1 |
| Pacemaker, Cardiac, External Transcutaneous (Non-Invasive) | Federal registry | 1 |
| Packaging Options | Company website | 1 |
| Pad, Heating, Powered | Federal registry | 1 |
| Pancreatic Stent, Covered, Metallic, Removable | Federal registry | 1 |
| Paper, Articulation | Federal registry | 1 |
| Paper, Obstetric Ph | Federal registry | 1 |
| Parainfluenza Multiplex Nucleic Acid Assay | Federal registry | 1 |
| Parenteral Administration Kit | Federal registry | 1 |
| Passer, Wire, Orthopedic | Federal registry | 1 |
| Patch, Pledget And Intracardiac, Petp, Ptfe, Polypropylene | Federal registry | 1 |
| Penile Implant Surgical Accessories | Federal registry | 1 |
| Perineometer | Federal registry | 1 |
| Peripheral Mechanical Thrombectomy With Aspiration | Federal registry | 1 |
| Permanent Defibrillator Electrodes | Federal registry | 1 |
| Ph Buffer | Federal registry | 1 |
| Phosphomolybdate (Colorimetric), Inorganic Phosphorus | Federal registry | 1 |
| Photometric Method, Iron (Non-Heme) | Federal registry | 1 |
| Photometric Method, Magnesium | Federal registry | 1 |
| Pill Crusher/Cutter | Federal registry | 1 |
| Pin, Retentive And Splinting, And Accessory Instruments | Federal registry | 1 |
| Plate, Bone | Federal registry | 1 |
| Plate, Cranioplasty, Preformed, Alterable | Federal registry | 1 |
| Plate, Fixation, Bone | Federal registry | 1 |
| Platelet And Plasma Separator For Bone Graft Handling | Federal registry | 1 |
| Platelet Factor 4 Radioimmunoassay | Federal registry | 1 |
| Platform, Force-Measuring | Federal registry | 1 |
| Plier, Orthodontic | Federal registry | 1 |
| Pneumoperitoneum Needle | Federal registry | 1 |
