A
- A1C
- AAA see Aortic Aneurysm
- Abdominal Aortic Aneurysm see Aortic Aneurysm
- Abdominal Pain
- Abdominal Pregnancy see Ectopic Pregnancy
- Abnormalities see Birth Defects
- ABO Blood Groups see Blood
- Abortion
- About Your Medicines see Medicines; Over-the-Counter Medicines
- ABPA see Aspergillosis
- Abscess
- Abuse see Child Abuse; Elder Abuse; Intimate Partner Violence
- Accident Prevention see Safety
- Accidents see Falls; First Aid; Wounds and Injuries
- Achalasia see Esophagus Disorders
- Achilles Tendon Injuries see Heel Injuries and Disorders
- Achondroplasia see Dwarfism
- Acid Reflux see GERD; Heartburn
- ACL Injuries see Knee Injuries and Disorders
- Acne
- Acne Rosacea see Rosacea
- Acoustic Neuroma
- Acquired Immunodeficiency Syndrome see HIV
- Acromegaly see