- Magnesium sulphate, J3475
- Maintenance contract, ESRD, A4890
- Mannitol, J2150, J7665
- Mask
- aerosol, K0180
- oxygen, A4620
- Mastectomy
- bra, L8000
- form, L8020
- prosthesis, L8030, L8600
- sleeve, L8010
- Mattress
- air pressure, E0186
- alternating pressure, E0277
- dry pressure, E0184
- gel pressure, E0196
- hospital bed, E0271, E0272
- non-powered, pressure reducing, E0373
- overlay, E0371-E0372
- powered, pressure reducing, E0277
- water pressure, E0187
- Mecasermin, J2170
- Mechlorethamine HCl, J9230
- Medical and surgical supplies, A4206-A8999
- Medroxyprogesterone acetate, J1050
- Meloxicam, J1738
- Melphalan flufenamide, J9247
- Melphalan NOS, J9245, J9246
- Melphalan, oral, J8600
- Membrane graft/wrap, Q4205
- Methylnaltrexone, J2212
- Meperidine, J2175
- Meperidine and promethazine, J2180
- Mepivacaine HCl, J0670
- Mepolizumab, J2182
- Meropenem, J2185
- Mesna, J9209
- Metacarpophalangeal joint, prosthetic implant, L8630, L8631
- Metaproterenol sulfate, inhalation solution, concentrated, J7667, J7668
- Metaproterenol sulfate, inhalation solution, unit dose, J7669, J7670
- Metaraminol bitartrate, J0380
- Metatarsal joint, prosthetic implant, L8641
- Meter, bath conductivity, dialysis, E1550
- Methacholine chloride, J7674
- Methadone HCl, J1230
- Methocarbamol, J2800
- Methotrexate, oral, J8610
- Methotrexate sodium, J9250, J9260
- Methyldopate HCl, J0210
- Methylene blue, Q9968
- Methylprednisolone
- acetate, J1020-J1040
- oral, J7509
- sodium succinate, J2920, J2930
- Metoclopramide HCl, J2765
- Micafungin sodium, J2248
- Microbiology test, P7001
- Midazolam HCl, J2250
- Mileage, ambulance, A0380, A0390
- Milrinone lactate, J2260
- Mini-bus, nonemergency transportation, A0120
- Minocycline hydrochloride, J2265
- Mitomycin, J7315, J9280, J9281
- Mitoxantrone HCl, J9293
- Modalities, with office visit, M0005-M0008
- Mogamulizumab injection– kpkc, J9201
- Moisture exchanger for use with invasive mechanical ventilation, A4483
- Moisturizer, skin, A6250
- Monitor
- blood glucose, E0607
- blood pressure, A4670
- pacemaker, E0610, E0615
- Monitoring feature/device, A9279
- Monoclonal antibodies, J7505
- Morphine sulfate, J2270
- epidural or intrathecal use J2274
- Mouthpiece (for respiratory equipment), A4617
- Moxetumomab pasudotox – tdfx, J9313
- Moxifloxacin, J2280
- Mucoprotein, blood, P2038
- Multiaxial ankle, L5986
- Multidisciplinary services, H2000-H2001, T1023-T1028
- Multiple post collar, cervical, L0180-L0200
- Multi-Podus type AFO, L4396
- Muromonab-CD3, J7505
- Mycophenolate mofetil, J7517
- Mycophenolic acid, J7518
- MyOwn skin, Q4226