N-Acetylaspartic Acid, Canavan Disease, Random, Urine
N-Acetyltransferase 2 (NAT2) Genotype, Varies
N-Methylhistamine, 24 Hour, Urine
N-Methylhistamine, Random, Urine
NAbFeron (IFNB-1) Neutralizing Antibody Test
Nadolol, Serum/Plasma
Naloxone - Total (Conjugated/Unconjugated), Screen, Urine
Napsin A Immunostain, Technical Component Only
Narcolepsy-Associated Antigen, HLA-DQB1 Typing, Blood
Natural Killer (NK)/Natural Killer T-Cell Subsets, Quantitative, Blood
Necrotizing Myopathy Evaluation, Serum
Nectarine (Prunus spp) IgE
Nectin-4, Semi-Quantitative Immunohistochemistry, Manual
Negative Control, Technical Component Only
Neisseria gonorrhoeae, Miscellaneous Sites, Nucleic Acid Amplification, Varies
Neisseria gonorrhoeae, Nucleic Acid Amplification, Varies
Neisseria gonorrhoeae, Self-Collect, Amplified RNA, Vaginal
Neisseria gonorrhoeae, Self-Collect, Nucleic Acid Amplification, Rectal
Neisseria gonorrhoeae, Self-Collect, Nucleic Acid Amplification, Throat
Neisseria Meningitidis IgG Vaccine Response
Neonatal Alloimmune Thrombocytopenia (NAIT)-Serial Monitoring Maternal only
Neonatal Bilirubin, Serum
Neopterin
Nephrocalcinosis, Nephrolithiasis, and Renal Electrolyte Imbalance Gene Panel, Varies
Nettle, IgE, Serum
Neu-N Immunostain, Technical Component Only
Neuro-Oncology Expanded Gene Panel with Rearrangement, Tumor
Neuro-Oncology Gene Panel, Mutations Only, Tumor
Neurochondrin Antibody, Cell-Binding Assay, Serum
Neurochondrin Antibody, Cell-Binding Assay, Spinal Fluid
Neurochondrin Antibody, Tissue Immunofluorescence Titer, Serum
Neurochondrin Antibody, Tissue Immunofluorescence Titer, Spinal Fluid
Neurofascin-155 IgG4, Flow Cytometry, Serum
Neurofibromatosis Type 1, NF1, Full Gene Analysis, Varies
Neurofilament (2F11) Immunostain, Technical Component Only
Neurofilament (SMI31) Immunostain, Technical Component Only
Neurofilament Light Chain, Plasma
Neuroimmunology Antibody Follow-up, Serum
Neuroimmunology Antibody Follow-up, Spinal Fluid
Neuromyelitis Optica (NMO)/Aquaporin-4-IgG Fluorescence-Activated Cell Sorting (FACS) Assay, Serum
Neuromyelitis Optica (NMO)/Aquaporin-4-IgG Fluorescence-Activated Cell Sorting (FACS) Assay, Spinal Fluid
Neuron-Specific Enolase (NSE), Spinal Fluid
Neuron-Specific Enolase Immunostain, Technical Component Only
Neuron-Specific Enolase, Serum
Neuronal Ceroid Lipofuscinosis (Batten Disease) Gene Panel, Varies
Neuronal Ceroid Lipofuscinosis, Two-Enzyme Panel, Blood Spot
Neuronal Ceroid Lipofuscinosis, Two-Enzyme Panel, Leukocytes
Neuronal Differentiation 1 (NeuroD1), Technical Component only
Neurosyphilis IgG Antibody Index with VDRL, Serum and Spinal Fluid
Neurosyphilis IgG, Antibody Index, Spinal Fluid
Neurotensin
Neurotransmitter Metabolites (5HIAA, HVA, 3OMD) (CSF)
Neurotransmitter Profile 3
Newborn Aneuploidy Detection, FISH, Blood
Nickel, 24 Hour, Urine
Nickel, Serum
Nickel/Creatinine Ratio, Random, Urine
Nicotine and Metabolites, Random, Urine
Nicotine and Metabolites, Serum
Nicotine Survey, Serum
Nitrogen, Total, 24 Hour, Urine
Nitrogen, Total, Feces
NKX3.1 Immunostain, Technical Component Only
Nocardia Stain, Varies
Non-Gynecologic Direct Smear (Bill Only)
Non-Gynecologic, ThinPrep (Bill Only)
Non-Seasonal Inhalant Allergen Profile, Serum
Nonalcoholic Steatohepatitis (NASH)-FibroTest, Serum and Plasma
Noonan Syndrome and Related Conditions Gene Panel, Varies
Norovirus PCR, Molecular Detection, Feces
Northeast Regional Allergen Profile, Serum
Nortriptyline, Serum
NOTCH3 Gene, Full Gene Analysis, Varies
Novel Psychoactives, Umbilical Cord Tissue
NR4A3 (9q22.33) Rearrangement, FISH, Tissue
NT-Pro B-Type Natriuretic Peptide, Serum
NTRK Genes Mutation Analysis, Next-Generation Sequencing, Tumor
Nuclear Magnetic Resonance Lipoprotein Profile, Serum
Nuclear Mitochondrial Gene Panel, Next-Generation Sequencing, Varies
Nucleophosmin (NPM1) Mutation Analysis, Varies
NUT Immunostain, Technical Component Only
NUTM1 (15q14) Rearrangement, FISH, Tissue
Nutmeg, IgE, Serum
Nuts Allergen Profile, Serum
Nuts and Grains Panel IgG