• NH3

  • Na

  • Native double-stranded DNA antibody

  • Neisseria gonorrhoeae by Nucleic Acid Amplification Test (NAAT); Neisseria gonorrhoeae Culture; Neisseria gonorrhoeae Gram Stain; Neisseria gonorrhoeae DNA Probe

  • Nicotine & Metabolites (urine, serum or plasma)

  • Nicotine/Cotinine

  • Nicotine; Cotinine

  • Non-HDL Cholesterol Test

  • Non-High Density Lipoprotein Cholesterol

  • Non-Invasive Prenatal Testing (NIPT)

  • Non-caeruloplasmin-bound copper

  • Noradrenaline (norepinephrine)

  • Nordimet

  • Nuelin SA