The Bajoran Medical Index was a repository of medical information on Bajor. It contained biographical and occupational information about doctors on the planet, and was organized by districts, such as the Northwestern District and the Northeastern District.
In 2369, Kira Nerys accessed the Medical Index from Deep Space 9 to track down Dr. Surmak Ren to enlist his aid in combating an aphasia virus that had been created by Dekon Elig, whom he had worked for as a medical assistant. The Index informed her that Dr. Surmak worked at the Ilvian Medical Complex as chief administrator. (DS9: "Babel")