- Askew, Henry F. (Henry Ford), 1805-1876, author1
- Association of Acting Assistant Surgeons of the United States Army, author.1
- Association of Collegiate Alumnae (U.S.), author.1
- Association of Medical Superintendents of American Institutions for the Insane.2
- Association of Medical Superintendents of American Institutions for the Insane. Annual Meeting 1853 : Baltimore, Md.)1
- Association of Military Surgeons of the United States, author.2
- Atkinson, Edward, 1827-19051
- Atkinson, I. Edmondson (Isaac Edmondson), 1846-1906, author1
- Atlee, Washington L. (Washington Lemuel), 1808-18781
- Atwater, H. H. (Hiram Hayden), author1
- Atwater, W. O. (Wilbur Olin), 1844-19071
- Austen, Philip H. (Philip Hiss), 1822-18781
- Bailey, John R. (John Read), 1833-1
- Baker, Albert Rufus, 1858- author1
- Baker, Henry B. (Henry Brooks), 1837-19202
- Baker, Henry B. (Henry Brooks), 1837-1920 author1
- Baldwin, J. F. (James Fairchild), 1850-1936, author1
- Baldy, J. M. (John Montgomery), 1860-19341
- Bancroft, Charles P. (Charles Parker), 1852-19231
- Barlow, Samuel B. (Samuel Bancroft), 1798-18761