| Near Drowning | 2 quizzes |
| Nearsightedness | 1 quiz |
| Necrotizing enterocolitis | 2 quizzes |
| Necrotizing fasciitis | 2 quizzes |
| Necrotizing vasculitis | 2 quizzes |
| Neurofibromatosis 2 | 2 quizzes |
| Neurogenic bladder | 1 quiz |
| Neurosyphilis | 3 quizzes |
| Nicotine dependence | 4 quizzes |
| No Menstrual Period | 1 quiz |
| Non-Hodgkin's Lymphoma | 2 quizzes |