| MDB — System, Blood Culturing | Class 1 / MI |
| MDC — Dna-Probe - Blastomyces Dermatitidis | Class 2 / MI |
| MDD — Device, Dermal Replacement | Class 3 / SU |
| MDE — Dna-Probe, Reagents, Cryptococcal | Class 2 / MI |
| MDF — Dna-Probe, Reagents, Coccidioides Immitis | Class 2 / MI |
| MDG — System, Intrafallopian Cannula | Class 2 / OB |
| MDI — Prosthesis, Rib Replacement | Class 2 / OR |
| MDJ — Reagents, Cysticercosis | Class 1 / MI |
| MDK — Dna-Probe, Reagents, Streptococcal | Class 1 / MI |
| MDL — Implant, Transmandibular | Class 2 / DE |
| MDM — Instrument, Manual, Surgical, General Use | Class 1 / SU |
| MDP — Separator For Therapeutic Purposes, Membrane Automated Blood Cell/Plasma | Class 3 / GU |
| MDR — Binder, Medical, Therapeutic | Class 1 / HO |
| MDS — Sensor, Glucose, Invasive | Class 3 / CH |
| MDT — Elisa, Trichinella Spiralis | Class 1 / MI |
| MDU — Antigen, Elisa, Cryptococcus | Class 2 / MI |
| MDZ — Cleaners, Medical Devices | Class 2 / HO |
| MEA — Pump, Infusion, Pca | Class 2 / HO |
| MEB — Pump, Infusion, Elastomeric | Class 2 / HO |
| MEC — Disinfector, Medical Devices | Class 2 / HO |
| MED — Sterilant, Medical Devices | Class 2 / HO |
| MEF — Ring, Teething, Non-Fluid Filled | Class 1 / DE |
| MEG — Syringe, Antistick | Class 2 / HO |
| MEH — Prosthesis, Hip, Semi-Constrained, Uncemented, Metal / Polymer, Non-Porous, Calcium Phosphate | Class 2 / OR |
| MEQ — System, Hyperthermia, Rf/Microwave (Benign Prostatic Hyperplasia),Thermotherapy | Class 3 / GU |
| MER — Stent, Urethral, Prostatic, Permanent Or Semi-Permanent | Class 3 / GU |
| MES — Stent, Urethral, Bulbous, Permanent Or Semi-Permanent | Class 3 / GU |
| MFA — Device, Removal, Pacemaker Electrode, Percutaneous | Class 3 / CV |
| MFD — Cannula, Intrauterine Insemination | Class 2 / OB |
| MFE — Agent, Injectable, Embolic | Class 3 / NE |
| MFJ — Device, Endoscopic Suturing | Class 2 / SU |
| MFK — Lens, Multifocal Intraocular | Class 3 / OP |
| MFR — Stimulator, Brain, Implanted, For Behavior Modification | Class f / NE |
| MFX — Vessel Guard Or Cover, To Facilitate Revision Surgeries | Class 2 / CV |
| MFY — Endothelial Cell Harvesting Kit | Class 2 / CV |
| MGA — Alpha-1 Microglobulin, Antigen, Antiserum, Control | Class 1 / IM |
| MGB — Device, Hemostasis, Vascular | Class 3 / CV |
| MGI — Aspirator, Ultrasonic | Class 3 / OB |
| MGM — C. Trachomatis (Chlamydia Group) | Class 1 / MI |
| MGO — Closure, Wound, Adhesive | Class 1 / SU |
| MGP — Dressing, Wound And Burn, Occlusive | Class U / SU |
| MGQ — Dressing, Wound And Burn, Hydrogel W/Drug And/Or Biologic | Class U / SU |
| MGR — Dressing, Wound And Burn, Interactive | Class 3 / SU |
| MGS — High Performance Liquid Chromatography For Cyclosporine | Class 2 / TX |
| MGU — Fluorescence Polarization Immunoassay For Cyclosporine | Class 2 / TX |
| MGV — Radioimmunoassay For Cyclosporine | Class 2 / TX |
| MGX — Test System, For Drugs Of Abuse | Class 3 / TX |
| MGZ — Valvulotome | Class 2 / CV |
| MHC — Needle, Interosseous | Class 2 / HO |
| MHD — Pump, Infusion, Gallstone Dissolution | Class 2 / HO |