ARTS riders must schedule their appointments at least (1) day in advance. Dispatchers will attempt to provide service for medical appointments only if scheduled before 10:00 am the day of. Please provide as much advanced notice as possible by calling 764-3384 or 1-800-442-3320 from 6:00 a.m to 5:00 p.m. ARTS has a TTY/TDD system for hearing limitations by calling the same number listed above or through Relay Service. For non-English clients, ARTS will get name and contract information and contract a translation service to assist.