- Rabies
- Radial Head Dislocation and Subluxation (Nursemaid's Elbow)
- Radiation Enteritis
- Radiation Sickness
- Radiopaque Lesion of Lung (algorithm)
- Rape Crisis Syndrome
- Rash (algorithm)
- Rathke Cleft Cyst
- Raynaud Phenomenon
- Raynaud Phenomenon (algorithm)
- Reactive Arthritis (Reiter Syndrome)
- Recommended Immunization Schedule for Adults Aged 19 Years or Older (algorithm)
- Recommended Immunization Schedule for Children and Adolescents Aged 18 Years or Younger (algorithm)
- Rectal Bleeding and Hematochezia (algorithm)
- Rectal Cancer
- Rectal Pain (algorithm)
- Rectal Prolapse
- Recurrent Pregnancy Loss (algorithm)
- Red Eye (algorithm)
- Reflexes, Hyperactive (algorithm)
- Reflexes, Hypoactive (algorithm)
- Refractive Errors
- Renal Calculi (algorithm)
- Renal Cell Carcinoma
- Renal Insufficiency
- Renal Tubular Acidosis
- Respiratory Distress Syndrome, Acute (ARDS)
- Respiratory Distress Syndrome, Neonatal
- Respiratory Syncytial Virus (RSV) Infection
- Restless Legs Syndrome
- Restless Legs Syndrome (algorithm)
- Restrictive Cardiomyopathy
- Retinal Detachment
- Retinitis Pigmentosa
- Retinopathy, Diabetic
- Retinopathy of Prematurity
- Retinoschisis
- Retroperitoneal Abscess
- Reye Syndrome
- Rhabdomyolysis
- Rhabdomyosarcoma
- Rheumatic Fever
- RH Incompatibility
- Rhinitis, Allergic
- Rhinitis, Chronic (algorithm)
- Rhinitis, Cold Air-Induced
- Rhinitis, Nonallergic
- Rocky Mountain Spotted Fever
- Roseola
- Rotator Cuff Impingement Syndrome
- Roundworms, Intestinal
- Roundworms, Tissue
- Ruptured Bowel
5-Minute Clinical Consult