Names
- Allen, Abijah Marvin (d. 1919)1
- Allen, Albert Langdon1
- Allen, Giles Bertram1
- Allyn, Charles Beckwith (d. 1885)1
- Alvord, Austin White (d. 1915)1
- Ambrook, Charles (d. 1911)1
- Ambrose, Hannibal Luther (d. 1902)1
- American Association for Thoracic Surgery1
- American Board of Surgery1
- American Cancer Society1
- American College of Surgeons1
- American Heart Association1
- American Medical Association1
- American Surgical Association1
- American Trudeau Society1
- American Trudeau Society.1
- Amerman, Albert Samuel (d. 1903)1
- Ames, Alonzo H. (d. 1866)1
- Anderson, Andrew Lewis (d. 1922)1
- Anderson, Elnora A. Upham (Totten) (d. 1882)1