- Neuromyopathy NEC 358.9
- Neuromyositis 729.1
- Neuronevus (M8725/0) - see Neoplasm, skin, benign
- Neuronitis 357.0
- Neuroparalytic - see condition
- Neuropathy, neuropathic (see also Disorder, nerve) 355.9
- Neurophthisis - see also Disorder, nerve
- Neuropraxia- see Injury, nerve
- Neuroretinitis 363.05
- Neurosarcoma (M9540/3) - see Neoplasm, connective tissue, malignant
- Neurosclerosis - see Disorder, nerve
- Neurosis, neurotic 300.9
- Neurospongioblastosis diffusa 759.5
- Neurosyphilis (arrested) (early) (inactive) (late) (latent) (recurrent) 094.9
- Neurotic (see also Neurosis) 300.9
- Neurotmesis - see Injury, nerve, by site
- Neurotoxemia - see Toxemia
- Neutro-occlusion 524.21
- Neutropenia, neutropenic (chronic) (cyclic) (drug-induced) (genetic) (idiopathic) (immune) (infantile) (malignant) (periodic) (pernicious) (primary) (splenic) (splenomegaly) (toxic) 288.0
- Neutrophilia, hereditary giant 288.2
- Nevocarcinoma (M8720/3) - see Melanoma
- Nevus (M8720/0) - see also Neoplasm, skin, benign
