- Christian, Henry A. (Henry Asbury), 1876-19515
- Church, James Robb, 1866-1923, author1
- Churchill, Mary Smith, author1
- Clifton Springs Sanitarium and Clinic, author.1
- Clymer, R. Swinburne (Reuben Swinburne), 1878-1966 author1
- Codman, E. A. (Ernest Amory), 1869-1940, author1
- Coello, Carlos V.1
- Cohen, Martin, 1875-1954, author1
- Cole, Rufus, 1872-19661
- Conant, Albert Francis, 1863-1923, compiler1
- Conference for the Revision of the Geneva Convention of 1864 (1906 : Geneva, Switzerland), author.1
- Conn, H. W. (Herbert William), 1859- author1
- Cooke, Joseph Brown, 1868-, author1
- Costa, Antonio Ferreira da, author1
- Costa, Arlindo Frederico de AzeveĢdo, author1
- Costa, Camillo de Lellis Gomes da, author1
- Costa, Pedro Augusto Rodrigues da, author1
- Council on Medical Education (American Medical Association), author.1
- Coyle, Edward R. (Edward Royal), author1
- Craig, Katherine Taylor, 1877-, author1