Contact Us Javier Lopez, DDS 2415 High School Avenue Suite 500 Concord, CA 94520 (925) 689-8711 Email Us Office Hours Monday 8:30 a.m. – 5:00 p.m. Tuesday 8:30 a.m. – 5:00 p.m. Wednesday 9:00 a.m. – 3:00 p.m. Thursday 8:30 a.m. – 5:00 p.m. Two Saturdays per month 8:30 a.m. – 3:00 p.m. Contact Form Our Location Our office is conveniently located next to the John Muir Health Concord Medical Center. Just off of Route 242, between Grant Street and Port Chicago Highway.