| MAH — Hearing Aid, Bone Conduction, Implanted | Class 2 / EN |
| MAI — Fastener, Fixation, Biodegradable, Soft Tissue | Class 2 / OR |
| MAJ — Catheter, Percutaneous, Intraspinal, Short Term | Class 2 / HO |
| MAL — Graft, Vascular, Synthetic/Biologic Composite | Class 2 / CV |
| MAM — Dna-Probe, B And T Lymphocyte | Class 2 / HE |
| MAN — Assay, Interleukin | Class 3 / IM |
| MAO — Dna-Probe, Human Chromosome | Class U / PA |
| MAQ — Kit, Dna Detection, Human Papillomavirus | Class 3 / MI |
| MAR — Cyclosporine And Metabolites Serum Assay | Class 2 / TX |
| MAU — Eraser, Dental Stain | Class 1 / DE |
| MAV — Syringe, Balloon Inflation | Class 2 / CV |
| MAW — Marker, Suture Identification | Class 1 / SU |
| MAX — Intervertebral Fusion Device With Bone Graft, Lumbar | Class 2 / OR |
| MAY — Prosthesis, Hip, Semi-Constrained, Metal/Ceramic/Polymer, Cemented Or Non-Porous Cemented, Osteophilic Finish | Class 2 / OR |
| MBB — Bone Cement, Antibiotic | Class 2 / OR |
| MBD — Prosthesis, Knee, Patello/Femorotibial, Unconstrained, Uncemented, Porous, Coated, Polymer/Metal/Polymer | Class 3 / OR |
| MBF — Prosthesis, Shoulder, Semi-Constrained, Metal/Polymer, Uncemented | Class 2 / OR |
| MBH — Prosthesis, Knee, Patello/Femorotibial, Semi-Constrained, Uncemented, Porous, Coated, Polymer/Metal/Polymer | Class 2 / OR |
| MBI — Fastener, Fixation, Nondegradable, Soft Tissue | Class 2 / OR |
| MBJ — Fastener, Fixation, Biodegradable, Hard Tissue | Class 3 / OR |
| MBL — Prosthesis, Hip, Semi-Constrained, Uncemented, Metal/Polymer, Porous | Class 2 / OR |
| MBP — Filler, Bone Void, Osteoinduction (W/O Human Growth Factor) | Class 2 / OR |
| MBQ — Peripheral Electromagnetic Field (Pemf) To Aid Wound Healing | Class 3 / PM |
| MBS — Filler, Bone Void, Non-Osteoinduction | Class 3 / OR |
| MBT — Dna-Probe, Reagent, Histoplasma Capsulatum | Class 2 / MI |
| MBU — Single-Use Internal Condom | Class 2 / OB |
| MBV — Prosthesis, Knee, Patello/Femorotibial, Semi-Constrained, Uhmwpe, Pegged, Cemented, Polymer/Metal/Polymer | Class 2 / OR |
| MBX — Stimulator, Thalamic, Epilepsy, Implanted | Class 3 / NE |
| MCA — Tape, Surgical, Internal | Class 2 / SU |
| MCB — Antigen, C. Difficile | Class 1 / MI |
| MCC — Dna-Probe, Haemophilus Spp. | Class 2 / MI |
| MCD — Antigen, Ebv, Capsid | Class 1 / MI |
| MCE — Respiratory Syncytial Virus - Elisa | Class 1 / MI |
| MCF — Unit, Ultraviolet Sanitation/Sterilization (For Toothbrushes), Sterile | Class 1 / DE |
| MCG — Dna-Probe, Agent, Listeria | Class 1 / MI |
| MCH — Clip, Hemostatic | Class 2 / SU |
| MCI — Graft, Vascular, Hemodialysis Access, Synthetic/Biological Composite | Class 3 / OB |
| MCK — Device, Voice Amplification | Class 2 / EN |
| MCL — Kit, Test, In Vitro Periodontal | Class 3 / DE |
| MCM — Implant, Cochlear | Class 3 / EN |
| MCN — Barrier, Absorbable, Adhesion | Class 3 / OB |
| MCP — Stimulator, Fetal, Acoustic | Class 3 / OB |
| MCS — Dna-Probe, Staphylococcus Aureus | Class 1 / MI |
| MCT — Dna-Probe, Strep Pneumoniae | Class 1 / MI |
| MCV — Spinal Pedicle Screw, Fixation, Appliance System | Class 3 / OR |
| MCW — Catheter, Peripheral, Atherectomy | Class 2 / CV |
| MCX — Catheter, Coronary, Atherectomy | Class 3 / CV |
| MCY — Wound Dressing Kit | Class 2 / SU |
| MCZ — Suture Removal Kit | Class 1 / SU |
| MDA — Elastomer, Silicone, For Scar Management | Class 1 / SU |