- nemaline myopathy, rod myopathy
- nematodiasis
- neologism
- neonatal behavioral assessment scale, Brazelton scale
- neonatal hepatitis syndrome
- neonate, newborn
- nephritic edema
- nephritic syndrome
- nephritis
- nephritogenic strains
- nephroblastoma, Wilms tumor
- nephrocalcinosis
- nephrogenic diabetes insipidus
- nephrogenic tissue
- nephrogram
- nephrology
- nephroptosis
- nephrosis
- nephrotic edema
- nephrotic syndrome
- nephrotoxicity
- nervousness
- neuralgia
- neurasthenia
- neurasthenic syndrome
- neuritis
- neurocutaneous syndrome
- neuroleptic malignant syndrome
- neurology
- neuromyositis
- neuromyotonia
- neuropathy
- neurosis
- new case registration rate of smearpositive pulmonary tuberculosis
- newborn BCG vaccination rate
- Newcastle diagnostic scale for depression
- niacin test
- night terrors
- nightmare
- nihilistic delusion
- nocardiosis
- nocturia
- nocturnal paroxysmal dyspnea
- nodding spasm, spasmus nutans
- nominal aphasia
- nonagenarian
- nonbacterial thrombotic endocarditis
- nonconvulsive ECT
- nondialytic treatment
- nonobstructive hypertrophic cardiomyopathy