- Rabies
- Reaction to severe stress, and adjustment disorders
- Rectal proplase
- Rectocele
- Rectovaginal fistula
- Red eye
- Reflux uropathy
- Renovascular hypertension
- Respiratory Tuberculosis
- Restless leg syndrome
- Reye's syndrome
- Rheumatic aortic valve insufficiency
- Rheumatic fever
- Rheumatic mitral valve diseases
- Rheumatoid arthritis
- Rotator cuff syndrome