| Rabies | 3 quizzes |
| Reactive attachment disorder of infancy OR early childhood | 1 quiz |
| Reiter's Syndrome | 4 quizzes |
| Renal Cell Cancer | 1 quiz |
| Respiratory Acidosis | 3 quizzes |
| Respiratory Alkalosis | 1 quiz |
| Retinal detachment | 4 quizzes |
| Reye's Syndrome | 5 quizzes |
| Rheumatic fever | 3 quizzes |
| Rheumatoid arthritis | 6 quizzes |
| Rhinitis | 2 quizzes |
| RSV Infection | 2 quizzes |