- abdominal pain
- abdominoplasty
- acoustic neuroma
- acromegaly
- actinic keratoses
- acupuncture
- acute aortic dissection
- acute bronchitis
- acute liver failure
- Acute Lymphoblastic Leukemia
- acute renal failure
- addictions
- ADHD
- adrenal insufficiency
- AIDS
- allergy
- alopecia
- Alzheimer
- anemia
- angioplasty
- anorexia nervosa
- anxiety disorders
- aortic dissection
- aortic valve stenosis
- appendicitis
- asthma
- atrial fibrillation
- Attention Deficit Hyperactivity Disorder
- autism