Section 3-104 of the Administrative Review Law specified the counties where Mary Slepicka was permitted to seek judicial review of a final order from the Illinois Department of Public Health in a billing dispute with Holy Family Villa, a Palos Park nursing home, under the Nursing Home Care Act. An administrative law judge held a hearing at the nursing home — in Cook County — when Slepicka invoked her right to administrative review of Holy Family Villa’s notice of intent to involuntarily transfer or …