| NMHINM | N-Methylhistamine, 24 Hour, Urine Mayo Clinic Laboratories in Rochester | 
      
        | NMOCS | Neuromyelitis Optica (NMO)/Aquaporin-4-IgG Fluorescence-Activated Cell Sorting (FACS) Assay, Serum Mayo Clinic Laboratories in Rochester | 
      
        | NMOFCM | Neuromyelitis Optica (NMO)/Aquaporin-4-IgG Fluorescence-Activated Cell Sorting (FACS) Assay, Spinal Fluid Mayo Clinic Laboratories in Rochester | 
      
        | NSESFM | Neuron-Specific Enolase (NSE), Spinal Fluid Mayo Clinic Laboratories in Rochester | 
      
        | NEOSHL | Newborn Metabolic Screen LAB480 State Hygienic Laboratory - Coralville, IA | 
      
        | NICOUM | Nicotine and Metabolites, Random, Urine Mayo Clinic Laboratories in Rochester | 
      
        | NICOSM | Nicotine and Metabolites, Serum Mayo Clinic Laboratories in Rochester | 
      
        | NSFIBM | Nonalcoholic Steatohepatitis (NASH)-FibroTest, Serum and Plasma Mayo Clinic Laboratories in Rochester | 
      
        | NVPCR | Norovirus by PCR LAB3410 State Hygienic Laboratory - Coralville, IA | 
      
        | NORTRI | Nortriptyline, Serum Mayo Clinic Laboratories in Rochester | 
      
        | NMRLPM | Nuclear Magnetic Resonance Lipoprotein Profile, Serum Mayo Clinic Laboratories in Rochester | 
      
        | NMEG | Nutmeg, IgE, Serum Mayo Clinic Laboratories in Rochester | 
      
        | NUTSPM | Nuts Allergen Profile, Serum Mayo Clinic Laboratories in Rochester |