Vallejo Address 1761 Broadway Suite 200 Vallejo, CA 94589 Hours Mon – Fri, 8:30 a.m. – 12:30 p.m. and 1:30 – 5:00 p.m. Contact (707) 645-2500 Driving Directions Click here for interactive driving directions. Our Services Assistive Listening DevicesHearing AidsHearing Tests (adult and pediatric) Our Team Robert Der, M.S.