| 2007735 | N Antigen Typing - Patient |
| 0070500 | N-Telopeptide, Cross-Linked, Serum |
| 0070062 | N-Telopeptide, Cross-Linked, Urine |
| 0091486 | Nalbuphine, Urine - Screen with Reflex to Confirmation/Quantitation |
| 0091590 | Naphthalene and Metabolite, Serum or Plasma |
| 0091591 | Naphthalene and Metabolite, Urine |
| 0091346 | Naproxen, Serum or Plasma |
| 0091099 | Naproxen, Urine |
| 2005023 | Narcolepsy (HLA-DQB1*06:02) Genotyping |
| 2005593 | Natalizumab Antibodies |
| 0092404 | Natural Killer Cell Enumeration |
| 2004360 | Natural Killer Cell Panel |
| 0099685 | Neisseria gonorrhoea Antibodies, Total |
| 0060244 | Neisseria gonorrhoeae by Transcription-Mediated Amplification (TMA) |
| 2001603 | Neisseria meningitidis Tetravalent Antibodies (Serogroups A, C, W-135 and Y), IgG |
| 0098195 | Neopterin, Serum |
| 2001952 | Neurofibromatosis Type 1 (NF1) Deletion/Duplication |
| 2007159 | Neurofibromatosis Type 1 (NF1) Sequencing |
| 2007154 | Neurofibromatosis Type 1 (NF1) Sequencing and Deletion/Duplication |
| 2004049 | Neurofilament by Immunohistochemistry |
| 2004230 | Neurokinin A (Substance K) |
| 0098198 | Neuron Specific Enolase |
| 0081226 | Neuron Specific Enolase, CSF |
| 2004052 | Neuron Specific Enolase, Polyclonal (NSE P) by Immunohistochemistry |
| 0098726 | Neuronal Cell Antibodies, CSF |
| 0099465 | Neuronal Cell Antibodies, Serum |
| 2006162 | Neuronal Nuclear Antibody (Hu) by IFA with Reflex to Titer and Western Blot, CSF |
| 2007963 | Neuronal Nuclear (Hu, Ri, Yo, and Amphiphysin) Antibodies IgG by Immunoblot |
| 2004046 | Neuronal Nuclei (NeuN) by Immunohistochemistry |
| 0055506 | Neutrophil-Associated Antibodies |
| 0096657 | Neutrophil Oxidative Burst Assay (DHR) |
| 0092168 | Niacin (Vitamin B3) |
| 0099452 | Nickel, Serum |
| 0025045 | Nickel, Urine |
| 0092361 | Nicotine and Metabolites, Serum or Plasma |
| 0092356 | Nicotine and Metabolites, Urine |
| 0051458 | Niemann-Pick, Type A (SMPD1) 4 Mutations |
| 0051459 | Niemann-Pick, Type A (SMPD1) 4 Mutations, Fetal |
| 0091496 | Nitrazepam, Urine |
| 0091563 | Nitrofurantoin, Serum or Plasma |
| 0092493 | Nitrogen, Total 48, 72, or 96 Hours, Fecal |
| 0092140 | Nitrogen, Total, Urine |
| 2005164 | N-methyl-D-Aspartate Receptor Antibody, IgG, CSF with Reflex to Titer |
| 2004221 | N-methyl-D-Aspartate Receptor Antibody, IgG, Serum with Reflex to Titer |
| 0080281 | NMP22® |
| 2002043 | NMR LipoProfile® Test |
| 2003323 | NMR LipoProfile®, Particle Analysis Only |
| 0060093 | Nocardia Culture and Gram Stain |
| 2005386 | Non-Criteria Antiphospholipid Syndrome (APS) Antibody Panel |
| 2007537 | Non-Invasive Prenatal Testing for Fetal Aneuploidy |
| 0051805 | Noonan Syndrome (PTPN11) Sequencing |
| 2004189 | Noonan Syndrome (PTPN11) Sequencing with Reflex to (SOS1) Sequencing |
| 2004195 | Noonan Syndrome (SOS1) Sequencing |
| 0051281 | Norovirus Group 1 and 2 Detection by RT-PCR |
| 0090074 | Nortriptyline |
| 0040174 | NPM1 Mutation by PCR and Fragment Analysis |
| 2003123 | NRAS Mutation Detection by Pyrosequencing |
| 0050639 | Nuclear Antibody (ANA) by IFA, IgG |
| 0080235 | 5'Nucleotidase |
