| MACNUT | Macadamia Nut, IgE |
| MACKRL | Mackerel IgE |
| MCRAD | Macroamylase Determination |
| MPRL | Macroprolactin |
| MG | Magnesium |
| MGF | Magnesium, Fecal |
| MRBC | Magnesium, RBC |
| UMGB | Magnesium, Urine, 24 Hour |
| UMGS | Magnesium, Urine, Random |
| PSPCR | Malaria (Plasmodium Species) by PCR |
| TSTP | Male Testosterone Panel |
| MHPS | Malignant Hyperthermia Panel, Sequencing |
| MNB | Manganese, Blood |
| MAN | Manganese, Serum |
| WBM | Manganese, Whole Blood |
| MANGO | Mango IgE |
| MBLS | Mannose Binding Lectin |
| FBN1 | Marfan Syndrome, FBN1 Sequencing |
| MSSI1 | Maternal Serum Screening, Integr Spec #1 PAPP-A, NT |
| MSSI2 | Maternal Serum Screening, Integrated Spec #2 |
| MMP9A | Matrix Metalloproteinase-9 (MMP-9) |
| RUOL | Measles (Rubeola) Antibody, IgG |
| MEAM | Measles (Rubeola) Antibody, IgM |
| MVNAAT | Measles Virus by Qualitative NAAT |
| MEASLE | Measles Virus PCR (Swab or Urine) |
| MMRRPS | Measles/Mumps/Rubella Immunity, Qualitative |
| MMRVI | Measles/Mumps/Rubella/Varicella Zoster Immunity Qualitative |
| MMRVPAN | Measles/Mumps/Rubella/VZV Quant Antibody Assessment Panel, IgG |
| MDS11 | Meconium Drug Screen Panel 11 |
| MDSPR | Meconium Drug Screen Panel 12 w/Alcohol |
| MSHA | Melanocyte Stimulation Hormone, Alpha (a-MSH) |
| MLTNP | Melatonin, Serum or Plasma |
| MEEP | Meningitis/Encephalitis Panel |
| FMEP | Meperidine (Demerol) and Normeperidine, Serum |
| CDMEPE | Meperidine & Metabolite, UR, Quant |
| MPDN | Meperidine and Metabolite, Serum |
| MEPURQ | Meperidine, Urine w/reflex to Quantitation |
| HG | Mercury, Blood |
| URHG | Mercury, Random or 24 Hour Urine |
| METN | Metanephrines Urine Total/Fractionated Random or 24 Hr. |
| MFPF | Metanephrines, Fractionated, Plasma Free |
| MTFRM | Metformin |
| METHM | Methadone & Metabolite, Urine Quantitation |
| MCUN | Methadone Screen & Confirmation, Urine |
| METHS | Methadone, Serum/Plasma |
| METHME | Methamphetamine and Metabolite, Blood |
| MEOH | Methanol, Blood |
| MHGV | Methemoglobin |
| METX | Methotrexate |
| NMES | Methsuximide (Celontin) |
| MMASR | Methylmalonic Acid (MMA) Serum Quantitative |
| MMMAL | Methylmalonic Acid (MMA) Urine Quantitative |
| MCRT | Microalbumin/Creatinine Ratio, 24 Hour Timed Urine |
| MCRR | Microalbumin/Creatinine Ratio, Urine |
| MICSPOR | Microsporidia by PCR |
| MILK | Milk IgE |
| AMIT | Mitochondrial (M2) Antibody, IgG |
| MTDNA | Mitochondrial Disorders Panel (mtDNA & Nuclear Genes) |
| MITOSP | Mitotane, Serum or Plasma |
| MOLYBD | Molybdenum Quant, Serum or Plasma |
| QMPSS | Monoclonal Gammopathy |
| MPSU | Monoclonal Protein Study, 24 Hr. Urine |
| MONX | Mononucleosis |
| MORPU | Morphine Level, Urine |
| FMNPP | Motor Neuropathy Panel |
| MSNER | Motor Sensory Eval |
| MDS2 | Movement Disorder, Autoimmune Eval, Serum |
| MPLMUT | MPL Mutation Detection |
| MRSANS | MRSA by PCR, Nasal |
| MRSCU | MRSA Culture |
| MTHF | MTHFR DNA Analysis |
| MUGWRT | Mugwort IgE |
| MEN1 | Multiple Endocrine Neoplasia Type 1 (MEN1) Sequencing |
| MSPL | Multiple Sclerosis Panel |
| MUMPG | Mumps Ab IgG |
| MUMPQT | Mumps IgG, Quantitative |
| MUMPM | Mumps IgM Abs |
| MUMPCR | Mumps Virus by PCR |
| MUSHRM | Mushroom IgE |
| MUSK | MuSK Antibody |
| MUSTRD | Mustard IgE |
| FMGRP | Myasthenia Gravis Reflex Panel |
| TBAPR | Mycobacterium tuberculosis Amplified Direct Detection |
| MYPH | Mycophenolic Acid (Cellcept) |
| MYCOPC | Mycoplasma & Ureaplasma Species (Urogenital) by PCR |
| AMGEN | Mycoplasma genitalium, Transcription-Mediated Amplification, Urine or Urogenital Swab |
| MYAGM | Mycoplasma pneumoniae Antibodies, IgG & IgM |
| MYABG | Mycoplasma pneumoniae Antibody, IgG |
| MYPM | Mycoplasma pneumoniae Antibody, IgM |
| MYCPNA | Mycoplasma Pneumoniae by PCR |
| MYD88 | MYD88 Mutation Detection, Peripheral blood |
| MAGAB | Myelin Associated Glycoprotein (MAG) Antibody, IgM |
| MYBP | Myelin Basic Protein |
| MOGAG | Myelin Oligodendrocyte Glycoprotein (MOG) Ab, IgG w/reflex |
| MOGFS | Myelin Oligodendrocyte Glycoprotein IgG (FACS) Assay, Serum |
| MYMPB | Myeloid Mutation Panel, Blood |
| MYELOB | Myeloma Screening Panel |
| MAS1 | Myelopathy, Autoimmune/Paraneoplastic Eval, Serum |
| MPO | Myeloperoxidase (MPO) Antibody |
| MPNPB | Myeloproliferative Neoplasm (MPN) Panel/Peripheral Blood |
| MYOAST | Myocardial Antibody Screen w/reflex to Titer |
| MYOGS | Myoglobin |
| UMYG | Myoglobin, Urine |
| FMYO3 | MyoMarker 3 Profile |
