| Light Adjustable Lens (Lal) And Light Delivery Device (Ldd) | Federal registry | 1 |
| Light, Examination, Medical, Battery Powered | Federal registry | 1 |
| Liner, Cavity, Calcium Hydroxide | Federal registry | 1 |
| Lipase-Esterase, Enzymatic, Photometric, Lipase | Federal registry | 1 |
| Lipase Hydrolysis/Glycerol Kinase Enzyme, Triglycerides | Federal registry | 1 |
| Lipoprotein, Low-Density, Antigen, Antiserum, Control | Federal registry | 1 |
| L-Leucine-4-Nitroanilide (Colorimetric), Leucine Arylamidase | Federal registry | 1 |
| Locator, Root Apex | Federal registry | 1 |
| Low Energy Direct Current Thermal Ablation System | Federal registry | 1 |
| Lubricant, Patient | Federal registry | 1 |
| M7 Accelerometer | Company website | 1 |
| Maggots, Medical | Federal registry | 1 |
| Magnifier, Hand-Held, Low-Vision | Federal registry | 1 |
| Maintainer, Space Preformed, Orthodontic | Federal registry | 1 |
| Mammary Sizer | Federal registry | 1 |
| Marker, Radiographic, Implantable | Federal registry | 1 |
| Mask, Oxygen, Non-Rebreathing | Federal registry | 1 |
| Massager, Vacuum, Radio Frequency Induced Heat | Federal registry | 1 |
| Media And Components, Synthetic Cell And Tissue Culture | Federal registry | 1 |
| Media, Corneal Storage | Federal registry | 1 |
| Media, Electroconductive | Federal registry | 1 |
| Meningitis/Encephalitis Pathogen Multiplex Nucleic Acid Detection System | Federal registry | 1 |
| mercury | Federal registry | 1 |
| Mesh, Surgical, Non-Absorbable, Large Abdominal Wall Defects | Federal registry | 1 |
| Mesh, Surgical, Polymeric | Federal registry | 1 |
| Metal | Company website | 1 |
| Metal Stamping | Company website | 1 |
| Meter, Airway Pressure (Inspiratory Force) | Federal registry | 1 |
| Method, Nephelometric, Immunoglobulins (G, A, M) | Federal registry | 1 |
| Micro Mixer | Federal registry | 1 |
| Microscope, Operating & Accessories, Ac-Powered, Ophthalmic | Federal registry | 1 |
| Microscope, Surgical | Federal registry | 1 |
| Mil Spec | Company website | 1 |
| Mirror, Mouth | Federal registry | 1 |
| Mixture, Hematology Quality Control | Federal registry | 1 |
| Monitor, Airway Pressure (Includes Gauge And/Or Alarm) | Federal registry | 1 |
| Monitor And/Or Control, Level Sensing, Cardiopulmonary Bypass | Federal registry | 1 |
| Monitor, Carbon-Dioxide, Cutaneous | Federal registry | 1 |
| motion sensors | Company website | 1 |
| Mouthpiece, Breathing | Federal registry | 1 |
| Mouthpiece, Saliva Ejector | Federal registry | 1 |
| Multi-Analyte Controls Unassayed | Federal registry | 1 |
| Nadh Oxidation/Nad Reduction, Alt/Sgpt | Federal registry | 1 |
| Nadh Oxidation/Nad Reduction, Ast/Sgot | Federal registry | 1 |
| Nad Reduction/Nadh Oxidation, Cpk Or Isoenzymes | Federal registry | 1 |
| Nad Reduction/Nadh Oxidation, Lactate Dehydrogenase | Federal registry | 1 |
| Nail, Fixation, Bone | Federal registry | 1 |
| Needle, Biopsy, Cardiovascular | Federal registry | 1 |
| Needle, Conduction, Anesthetic (W/Wo Introducer) | Federal registry | 1 |
| Needle, Emergency Airway | Federal registry | 1 |
