| NEREG | Northeast Regional Allergen Profile, Serum Mayo Clinic Laboratories in Rochester | 
      
        | NOTRP | Nortriptyline, Serum Mayo Clinic Laboratories in Rochester | 
      
        | NTC3Z | NOTCH3 Gene, Full Gene Analysis, Varies Mayo Clinic Laboratories in Rochester | 
      
        | FCDU4 | Novel Psychoactives, Umbilical Cord Tissue NMS Labs | 
      
        | NR4A3 | NR4A3 (9q22.33) Rearrangement, FISH, Tissue Mayo Clinic Laboratories in Rochester | 
      
        | PBNP1 | NT-Pro B-Type Natriuretic Peptide, Serum Mayo Clinic Laboratories in Rochester | 
      
        | NTRK | NTRK Gene Fusion Panel, Tumor Mayo Clinic Laboratories in Rochester | 
      
        | NTRKM | NTRK Genes Mutation Analysis, Next-Generation Sequencing, Tumor Mayo Clinic Laboratories in Rochester | 
      
        | NMRLP | Nuclear Magnetic Resonance Lipoprotein Profile, Serum Mayo Clinic Laboratories in Rochester | 
      
        | NMITO | Nuclear Mitochondrial Gene Panel, Next-Generation Sequencing, Varies Mayo Clinic Laboratories in Rochester | 
      
        | NPM1Q | Nucleophosmin (NPM1) Mutation Analysis, Varies Mayo Clinic Laboratories in Rochester | 
      
        | NUT | NUT Immunostain, Technical Component Only Mayo Clinic Laboratories in Rochester | 
      
        | NUT1F | NUTM1 (15q14) Rearrangement, FISH, Tissue Mayo Clinic Laboratories in Rochester | 
      
        | NMEG | Nutmeg, IgE, Serum Mayo Clinic Laboratories in Rochester | 
      
        | NUTSP | Nuts Allergen Profile, Serum Mayo Clinic Laboratories in Rochester | 
      
        | FNGPG | Nuts and Grains Panel IgG Eurofins Viracor |