| Mask, Oxygen | Federal registry | 1 |
| Mask, Oxygen, Low Concentration, Venturi | Federal registry | 1 |
| Mask, Oxygen, Non-Rebreathing | Federal registry | 1 |
| Massager, Powered Inflatable Tube | Federal registry | 1 |
| Mattress, Air Flotation, Alternating Pressure | Federal registry | 1 |
| Mechanical Seals | Company website | 1 |
| Media, Coupling, Ultrasound | Federal registry | 1 |
| Media, Electroconductive | Federal registry | 1 |
| Media, Mounting, Oil Soluble | Federal registry | 1 |
| Media, Mounting, Water Soluble | Federal registry | 1 |
| Medical Device Data System | Federal registry | 1 |
| Medical Gowns With Chemotherapy Labeling Claims - Tested For Use With Chemotherapy Drugs | Federal registry | 1 |
| Mesh, Surgical | Federal registry | 1 |
| Mesh, Surgical, Collagen, Staple Line Reinforcement | Federal registry | 1 |
| Mesh, Surgical, Collagen, Thoracic, Chest Wall Reconstruction | Federal registry | 1 |
| Mesh, Surgical, Non-Absorbable, Orthopaedics, Reinforcement Of Tendon | Federal registry | 1 |
| Mesh, Surgical, Non-Resorbable, Orthopedics, Reinforcement Of Ligament | Federal registry | 1 |
| Mesh, Surgical, Non-Synthetic, Urogynecologic, For Apical Vaginal And Uterine Prolapse, Transabdominally Placed | Federal registry | 1 |
| Mesh, Surgical, Polymeric | Federal registry | 1 |
| Method, Enzymatic, Glucose (Urinary, Non-Quantitative) | Federal registry | 1 |
| Methylene Blue Thiocyanate | Federal registry | 1 |
| Microfilter, Blood Transfusion | Federal registry | 1 |
| Micro Pipette | Federal registry | 1 |
| Microscope, Surgical | Federal registry | 1 |
| Microtome, Accessories | Federal registry | 1 |
| Mil-Spec Contacts | Company website | 1 |
| Mirror, Ent | Federal registry | 1 |
| Mirror, General & Plastic Surgery | Federal registry | 1 |
| Mixer, Cement, For Clinical Use | Federal registry | 1 |
| Monitor, Bed Patient | Federal registry | 1 |
| Monitor, Heart Rate, Fetal, Ultrasonic | Federal registry | 1 |
| Monitor, Ultrasonic, Fetal | Federal registry | 1 |
| Mouthguard, Prescription | Federal registry | 1 |
| Mouthpiece, Breathing | Federal registry | 1 |
| Multi-Analyte Respiratory Virus Antigen Detection Test | Federal registry | 1 |
| Needle, Assisted Reproduction | Federal registry | 1 |
| Needle, Biopsy, Cardiovascular | Federal registry | 1 |
| Needle, Conduction, Anesthetic (W/Wo Introducer) | Federal registry | 1 |
| Needle, Hypodermic, Single Lumen | Federal registry | 1 |
| Needle, Neurosurgical Suture | Federal registry | 1 |
| Needle, Suturing, Disposable | Federal registry | 1 |
| Negative Pressure Wound Therapy Powered Suction Pump | Federal registry | 1 |
| Neurosurgical Paddie | Federal registry | 1 |
| Nitroprusside, Ketones (Urinary, Non-Quant.) | Federal registry | 1 |
| Non-Coring (Huber) Needle | Federal registry | 1 |
| Non-Surgical Gown | Federal registry | 1 |
| Nuts | Company website | 1 |
| Operating Room Accessories Table Tray | Federal registry | 1 |
| Ophthalmoscope, Battery-Powered | Federal registry | 1 |
| Orange G | Federal registry | 1 |
