- Babesiosis
- Bacillary Angiomatosis
- Bacteremia
- Bad Breath
- Balance and Coordination Tests
- Balanitis
- Balantidiasis
- Balloon Valvuloplasty
- Barbiturate-Induced Coma
- Barbiturates
- Barium Enema
- Bartholin's Gland Cyst
- Bartonellosis
- Battered Child Syndrome
- Bed-Wetting
- Bedsores
- Behcet's Syndrome
- Bejel
- Bell's Palsy
- Bence Jones Protein Test
- Bender-Gestalt Test
- Benzodiazepines
- Beriberi
- Berylliosis
- Beta Blockers
- Beta2-Microglobulin Test
- Bile Duct Cancer
- Biliary Atresia
- Binge-Eating Disorder
- Biofeedback
