MAGNESIUM, BLOOD

MAGNESIUM, RANDOM URINE

MAGNESIUM, TIMED URINE BATTERY

MAGNESIUM, URINE, 24-HOUR

MALARIA PREP, BLOOD

MANGANESE, SERUM

MCAD (MEDIUM CHAIN ACYL CoA DEHYDROGENASE) DEFICIENCY

MEASLES, IgG AND IgM (SEPARATE DETERMINATIONS), SERUM

MEASLES, IgG, BLOOD

MEFV

MELLARIL

MEPERIDINE (DEMEROL®), BLOOD

MEPHENYTOIN (MESANTOIN®) AND NORMEPHENYTOIN, PLASMA OR SERUM

MEPHOBARBITAL, PLASMA

MERCURY, BLOOD

MERCURY, URINE

METACHROMATIC LEUKODYSTROPHY

METANEPHRINES, FRACTIONATED, 24-HOUR, URINE

METANEPHRINES, FRACTIONATED, RANDOM URINE

METANEPHRINES, PLASMA

METHADONE, URINE

METHANOL, QUANTITATIVE, BLOOD

METHOTREXATE, BLOOD

METHOTREXATE, BLOOD NON-OSTEO 24

METHOTREXATE, BLOOD NON-OSTEO 28

METHOTREXATE, BLOOD NON-OSTEO 42

METHOTREXATE, BLOOD NON-OSTEO 48

METHOTREXATE, BLOOD OSTEO 24

METHOTREXATE, BLOOD OSTEO 48

METHSUXIMIDE, SERUM

METHYLENETETRAHYDROFOL REDUCTASE, MUTATION, BLOOD

METHYLMALONIC ACID

MEXILETINE, PLASMA OR SERUM

MICROALBUMIN, URINE, 24 HOUR OR TIMED

MICROALBUMIN/CREATININE RANDOM URINE BATTERY

MICROSPORIDIA STAIN

MICROSPORIDIUM STAIN

MILK PRECIPTINS

MISSOURI-ILLINOIS REGIONAL ALLERGEN PANEL, BLOOD

MITOCHONDRIAL ANTIBODIES, BLOOD

MITOCHONDRIAL DNA PANEL 1 & 2

MITOTANE (LYSODREN)

MONONUCLEOSIS SCREEN

MORPHOLOGIC EXAMINATION, PEDIATRICS

MPA

MTHFR

MUCKLE-WELLS SYNDROME

MUCOPOLYSACCHARIDES SCREEN, QUANTITATIVE, URINE

MULTIPLE ENDOCRINE NEOPLASIA 2B (MEN 2B)

MULTIPLE ENDOCRINE NEOPLASIA/FAMILIAL MEDULLARY THYROID CARCINOMA (MEN/FMTC) COMPREHENSIVE OR FOLLOW-UP (FOR RET PROT-O-ONCOGENE MUTATIONS)

MULTIPLE SCLEROSIS (MS) PROFILE

MUMPS IgG IMMUNE STATUS, SERUM

MUMPS VIRUS ANTIBODY, IgG AND IgM, SERUM

MUMPS VIRUS ANTIBODY, IgG AND IgM, SPINAL FLUID

MUMPS VIRUS ANTIBODY, IGM, SERUM

MURAMIDASE

MVF

MYASTHENIA GRAVIS EVALUATION, PEDIATRIC

MYCOPHENOLIC ACID, SERUM

MYCOPLASMA PNEUMONIAE ANTIBODY, IgG, BLOOD

MYCOPLASMA PNEUMONIAE ANTIBODY, IgM, BLOOD

MYCOPLASMA PNEUMONIAE DNA DETECTION BY PCR

MYELIN BASIC PROTEIN, SPINAL FLUID

MYOCARDIAL ANTIBODIES, SERUM

MYOGLOBIN, BLOOD

MYOGLOBIN, URINE

MYOSITIS PANEL