| MRZ — Accessories, Pump, Infusion | Class 2 / HO |
| MSA — Dressing, Wound And Burn, Occlusive, Heated | Class 1 / SU |
| MSB — System And Accessories, Isolated Heart, Transport And Preservation | Class 2 / GU |
| MSC — Barrier, Std, Oral Sex | Class 2 / OB |
| MSD — Catheter, Hemodialysis, Implanted | Class 2 / GU |
| MSE — Hemodialyzer, Re-Use, Low Flux | Class 2 / GU |
| MSF — Hemodialyzer, Re-Use, High Flux | Class 2 / GU |
| MSG — Ophthalmoscopes, Replacement Batteries, Hand-Held | Class 2 / OP |
| MSH — Respirator, Surgical | Class 2 / HO |
| MSI — Solution, Cleaning / Lubricating, Artificial Eye | Class 3 / OP |
| MSJ — Apolipoproteins | Class 1 / CH |
| MSK — Immunoassay For Blood Tacrolimus | Class N / TX |
| MSL — System, Test, Topiramatee | Class 2 / TX |
| MSM — System, Test, Lipoprotein(A) | Class 1 / CH |
| MSQ — Test, Urea (Breath Or Blood) | Class 1 / MI |
| MSR — Tubing, Replacement, Phacofragmentation Unit | Class 2 / OP |
| MSS — Folders And Injectors, Intraocular Lens (Iol) | Class 1 / OP |
| MST — Antibodies, Gliadin | Class 2 / IM |
| MSV — System,Test,Antibodies,B2 - Glycoprotein I (B2 - Gpi) | Class 2 / IM |
| MSW — System, Test, Thyroglobulin | Class 2 / IM |
| MSX — System, Network And Communication, Physiological Monitors | Class 2 / CV |
| MSY — Strip, Test, Reagent, Residuals For Dialysate, Disinfectant | Class 2 / GU |
| MSZ — Strip, Test, Reagent, Residuals For Dialysate | Class 2 / GU |
| MTA — Lens, Intraocular, Phakic | Class 3 / OP |
| MTC — Indicator, Chemical, Enzymatic, Sterilization Process | Class 2 / HO |
| MTD — Catheter, Intracardiac Mapping, High-Density Array | Class 2 / CV |
| MTE — System, Pacing, Temporary, Acute, Internal Atrial Defibrillation | Class 3 / CV |
| MTF — Total, Prostate Specific Antigen (Noncomplexed & Complexed) For Detection Of Prostate Cancer | Class 3 / IM |
| MTG — Test, Prostate Specific Antigen, Free, (Noncomplexed) To Distinguish Prostate Cancer From Benign Conditions | Class 3 / IM |
| MTH — Tray, Leukocyte Typing | Class N / HE |
| MTI — Kit, Cell Screening, Fetal | Class N / PA |
| MTJ — Wax, Bone | Class U / OR |
| MTK — Kit, Sample Collection, Hiv | Class 3 / HE |
| MTL — Monitor,Test,Hiv-1 | Class 3 / HE |
| MTN — Test, Syphilis, Treponemal | Class N / HE |
| MTO — Software, Management, Microplate Assay | Class N / HE |
| MTP — Antibody To Htlv-1, Elisa | Class 3 / HE |
| MTQ — Software, Blood Virus Applications | Class N / HE |
| MTR — Progenitor Cell Enumeration | Class 2 / HE |
| MTS — Vials, Challenge, Endotoxin | Class N / HE |
| MTV — Sharps Needle Destruction Device | Class 2 / HO |
| MTW — System, Water, Reproduction, Assisted, And Purification | Class 2 / OB |
| MTX — Microscope And Microscope Accessories, Reproduction, Assisted | Class 1 / OB |
| MTZ — Wrap, Implant, Orbital | Class 2 / OP |
| MUA — Bone Sonometer | Class 2 / RA |
| MUD — Oximeter, Tissue Saturation | Class 2 / SU |
| MUE — Full Field Digital, System, X-Ray, Mammographic | Class 2 / RA |
| MUH — System, X-Ray, Extraoral Source, Digital | Class 2 / RA |
| MUI — Media, Coupling, Ultrasound | Class 2 / RA |
| MUJ — System, Planning, Radiation Therapy Treatment | Class 2 / RA |