| Media, Mounting, Water Soluble | Federal registry | 1 |
| Mediastinoscope, Surgical | Federal registry | 1 |
| Medical Device Data System | Federal registry | 1 |
| Medical Glove, Specialty | Federal registry | 1 |
| Medical Gloves With Chemotherapy Labeling Claims - Test For Use With Chemotherapy Drugs | Federal registry | 1 |
| Meprobamate Test System | Federal registry | 1 |
| Mesh, Surgical | Federal registry | 1 |
| Mesh, Surgical, Polymeric | Federal registry | 1 |
| Methyl Methacrylate For Cranioplasty | Federal registry | 1 |
| Microscope, Surgical | Federal registry | 1 |
| Microscope, Surgical, General & Plastic Surgery | Federal registry | 1 |
| Microtome, Cryostat | Federal registry | 1 |
| Microtome, Rotary | Federal registry | 1 |
| Mirror, Ent | Federal registry | 1 |
| Mitral Valve Repair Devices | Federal registry | 1 |
| Mixture, Hematology Quality Control | Federal registry | 1 |
| modular designs | Company website | 1 |
| Modules | Company website | 1 |
| Monitor, Blood-Gas, On-Line, Cardiopulmonary Bypass | Federal registry | 1 |
| Monitor, Breathing Frequency | Federal registry | 1 |
| Monitor, Physiological, Patient (Without Arrhythmia Detection Or Alarms) | Federal registry | 1 |
| Mounting Media | Federal registry | 1 |
| Mouthpiece, Breathing | Federal registry | 1 |
| Mycoplasma Pneumoniae Dna Assay System | Federal registry | 1 |
| Nail, Fixation, Bone | Federal registry | 1 |
| Nebulizer (Direct Patient Interface) | Federal registry | 1 |
| Nebulizer, Medicinal, Non-Ventilatory (Atomizer) | Federal registry | 1 |
| Needle, Conduction, Anesthetic (W/Wo Introducer) | Federal registry | 1 |
| Needle, Dental | Federal registry | 1 |
| Needle, Tonsil Suturing | Federal registry | 1 |
| Negative Pressure Wound Therapy Powered Suction Pump | Federal registry | 1 |
| Neurological Stereotaxic Instrument, Real-Time Intraoperative Mri | Federal registry | 1 |
| Neurovascular Mechanical Thrombectomy Device For Acute Ischemic Stroke Treatment | Federal registry | 1 |
| Night Guards | Company website | 1 |
| Non-Irrigation Endosseous Dental Implant Drill Bits | Federal registry | 1 |
| Non-Sars Coronavirus Multiplex Nucleic Acid Assay | Federal registry | 1 |
| Obturator, For Endoscope | Federal registry | 1 |
| optics | Company website | 1 |
| Oral Fluid Drugs Of Abuse And Alcohol Test Specimen Collection Device | Federal registry | 1 |
| Orthodontic Software | Federal registry | 1 |
| Orthosis, Foot Drop | Federal registry | 1 |
| Orthosis, Spinal Pedicle Fixation | Federal registry | 1 |
| Orthosis, Spondylolisthesis Spinal Fixation | Federal registry | 1 |
| Osteotome | Federal registry | 1 |
| Osteotome, Manual | Federal registry | 1 |
| Other Products | Company website | 1 |
| Over-The-Counter Covid-19 Antigen Test | Federal registry | 1 |
| Oximeter, Reprocessed | Federal registry | 1 |
| Oximeter, Tissue Saturation | Federal registry | 1 |
| Oxygenator, Cardiopulmonary Bypass | Federal registry | 1 |
