- Narcolepsy, electroencephalography of
- Nasal smear for eosinophils
- Nasogastric feeding with inadequate fluid, blood sodium levels in
- Nasogastric suction, potassium loss with
- Near drowning
- Necrosis, peritoneal fluid analysis in diagnosis of
- Neisseria gonorrhoeae
- Nelson syndrome, ACTH levels in
- Neonatal hyaline membrane disease
- Neonatal immune thrombocytopenia, platelet antibodies levels in
- Neonatal seizures, vitamin studies in
- Neovascularization
- Nephritis
- Nephrogenic diabetes insipidus
- Nephropathies with sodium or potassium wasting
- Nephrosis
- Nephrotic syndrome
- Nerve Fiber Analysis
- Neural tube defects
- Neuroblastoma
- Neurofibroma, biopsy of
- Neurogenic bladder, voiding cystourethrography in diagnosis of
- Neurological disorders, antinuclear, anti-DNA, anticentromere, antiextractable nuclear antigen, anti-Jo, and antiscleroderma antibody levels and
- Neutropenia, WBC count, blood smear, and differential testing in
- Neutrophilia, WBC count, blood smear, and differential testing in
- Neutrophils, immature
- Newborns and infants
- Newborn screening
- Night blindness, vitamin studies in
- Nitrates in urine
- Nitrazine test
- NMP22
- Nodular hyperplasia, liver and spleen scan for
- Noise induced hearing loss
- Nonadherence risk, antinuclear, anti-DNA, anticentromere, antiextractable nuclear antigen, anti-Jo, and antiscleroderma antibody levels and
- Nonerosive arthritis, antinuclear, anti-DNA, anticentromere, antiextractable nuclear antigen, anti-Jo, and antiscleroderma antibody levels and
- Non-Hodgkin disease
- Nonparathyroid hypercalcemia, parathyroid hormone levels in
- Nonprotein nitrogen (NPN)
- Nontropical sprue
- Nortriptyline
- Nose
- Nuclear medicine,
- Nuclear scan
- Nucleic acid testing (NAT)
- Nutrition
- Nystagmus, visual field test for
Davis's Lab & Diagnostic Tests