| MA2ES | Ma2 Antibody by ELISA, Serum Mayo Clinic Laboratories in Rochester | 
      
        | MA2EC | Ma2 Antibody, ELISA, Spinal Fluid Mayo Clinic Laboratories in Rochester | 
      
        | MACNT | Macadamia Nut, IgE, Serum Mayo Clinic Laboratories in Rochester | 
      
        | GNMTC | Macro/Microthrombocytopenia Gene Panel, Next-Generation Sequencing, Varies Mayo Clinic Laboratories in Rochester | 
      
        | Mg | Magnesium Level FMH Laboratory | 
      
        | MG_F | Magnesium, Feces Mayo Clinic Laboratories in Rochester | 
      
        | MALP | Malabsorption Evaluation Panel, Feces Mayo Clinic Laboratories in Rochester | 
      
        | LMALP | Malaria PCR with Parasitemia Reflex, Varies Mayo Clinic Laboratories in Rochester | 
      
        | LCMAL | Malaria, Molecular Detection, PCR, Varies Mayo Clinic Laboratories in Rochester | 
      
        | MAND | Mandarin, IgE, Serum Mayo Clinic Laboratories in Rochester | 
      
        | MNRCU | Manganese/Creatinine Ratio, Random, Urine Mayo Clinic Laboratories in Rochester | 
      
        | MNCU | Manganese/Creatinine Ratio, Urine Mayo Clinic Laboratories in Rochester | 
      
        | MANGO | Mango, IgE, Serum Mayo Clinic Laboratories in Rochester | 
      
        | MBLF | Mannan Binding Lectin Complement Pathway, Functional, Serum Mayo Clinic Laboratories in Rochester | 
      
        | MDIFF | Manual Differential FMH Laboratory | 
      
        | MSUDP | Maple Syrup Urine Disease Gene Panel, Varies Mayo Clinic Laboratories in Rochester | 
      
        | MFRGG | Marfan, Loeys-Dietz, and Aortopathy Gene Panel, Varies Mayo Clinic Laboratories in Rochester | 
      
        | MSMNT | Mass Spectrometry, Membranous Nephropathy, Technical Component (Bill Only) Mayo Clinic Laboratories in Rochester | 
      
        | MCM24 | Mast Cell Mediators, 24 Hour, Urine Mayo Clinic Laboratories in Rochester | 
      
        | MCMRU | Mast Cell Mediators, Random, Urine Mayo Clinic Laboratories in Rochester | 
      
        | NGBCL | MayoComplete B-Cell Lymphoma, Next-Generation Sequencing, Varies Mayo Clinic Laboratories in Rochester | 
      
        | MCBPP | MayoComplete Bladder and Prostate Cancer Panel, Next-Generation Sequencing, Tumor Mayo Clinic Laboratories in Rochester | 
      
        | NGCLN | MayoComplete Chronic Lymphoid Neoplasms, Next-Generation Sequencing, Varies Mayo Clinic Laboratories in Rochester | 
      
        | MCCRC | MayoComplete Colorectal Cancer Panel, Next-Generation Sequencing, Tumor Mayo Clinic Laboratories in Rochester | 
      
        | MCSRC | MayoComplete Comprehensive Sarcoma Panel, Next-Generation Sequencing, Tumor Mayo Clinic Laboratories in Rochester |