Lab Test Directory—Saint Luke's Regional Laboratories
| METAFF | Metanephrines, Plasma |
| META24U | Metanephrines, Urine |
| METHADONEU | Methadone Confirmation, Urine |
| METHANOL | Methanol |
| HGBMET | Methemoglobin, Blood |
| MRSA PCR | Methicillin-Resistant Staphylococcus aureus (MRSA) PCR |
| C MRSA | Methicillin-Resistant Staphylococcus aureus (MRSA) Screen, Nasal |
| METHOTREX | Methotrexate, Serum or Plasma |
| MTHFR | Methylenetetrahydrofolate Reductase Mutation Detection |
| MMAS | Methylmalonic Acid |