Call 888-810-5995 to speak with a Methadone counselor. Who Answers? Methadone Doctors in Apple Valley, California Kevork Iskenderian, M.D. 16195 Siskiyou Road Suite 120A Apple Valley, CA 92307 View Details → Howard Oliver, M.D. 18031 US Highway 18 Suite A Apple Valley, CA 92307 View Details → Danny Colton, M.D. 17868 Outer Highway 18 Suite # 211 Apple Valley, CA 92307 View Details →