- Cezar, Francisco Dias.1
- Chadwick, James R. (James Read), 1844-19051
- Chaillé, Stanford E. (Stanford Emerson), 1830-19111
- Chandler, Charles Frederick, 1836-1925, author1
- Charles N. Crittenton Co.1
- Cheever, David W. (David Williams), 1831-19151
- Cheever, David W. (David Williams), 1831-1915, author1
- Clark, Charles C. P. (Charles Cotesworth Pinckney), 1822-1899, author1
- Clark, E. A., M.D1
- Cochran, Jerome, 1831-1896 author1
- Cochran, Jerome, 1831-1896, author1
- Coles, Walter, 1839-18921
- Collège des médecins et chirurgiens du Bas-Canada author.1
- Columbia Hospital for Women and Lying-in Asylum (Washington, D.C.) author.1
- Columbia Pharmaceutical Association.1
- Combe, Andrew, 1797-18471
- Committee of Citizens of Boston Chosen to Raise a Morton Testimonial Fund, author.1
- Conklin, W. J. (William Judkins), 1844-19161
- Conklin, W. J. (William Judkins), 1844-1916, author1
- Cook, A. B. (Archie Brown), 1828- author1