- American Institute of Homeopathy, author.1
- American Invalid Aid Society, author.1
- American Laryngological Association, author.1
- American Laryngological Association.1
- American Medical Association, author.4
- American Medical Association.3
- American Medical Association. Committee on Adulterations and Sophistications of Drugs, Medicines, Chemicals, etc.1
- American Medical Association. Committee on Medical Education.1
- American Medical Association. Standing Committee on Medical Literature.1
- American Medical Society in Paris.3
- American Pediatric Society, author.1
- American Pharmaceutical Association. Committee on the Drug Market, author.1
- American Philosophical Society.1
- American Public Health Association.2
- Ames, Joseph, 1816-18721
- Andrews, Edmund, 1824-19042
- Angell, George T. (George Thorndike), 1823-1909, author1
- Army Medical Museum (U.S.)1
- Army Mutual Aid Association, author.3
- Arthur, Robert, 1819-1880, author1