Deputies said the alleged incident happened on campus at the office of Professor Mahmood Ghamsary, located at 11234 Anderson St., on Wednesday at about 3:40 p.m.
A female student was having a meeting with Ghamsary when deputies said he hugged her, then reached under her clothing and began touching her body without her consent.
Authorities said the victim told her boyfriend what occurred later that evening and the couple contacted the sheriff's department together.
Ghamsary, 63 of Studio City, was arrested for sexual battery and his bail was set at $25,000.
His arraignment was scheduled for Monday in San Bernardino Superior Court.
Loma Linda University Medical Center said Ghamsary was a professor in the School of Public Health and had been with the university since 2000.
The school said Ghamsary has been placed on leave pending an investigation.
Anyone with information about the alleged sexual battery, or who believes they were a victim of an unreported crime related to Ghamsary, is urged to call Det. Ken Marshall with the San Bernardino County Sheriff's Department at (909)387-3545.
Callers wishing to remain anonymous were urged to call the We-Tip Hotline at 1-800-782-7463.