Rancho Family Medical Group Patient Portal. Drugs (5 days ago) Rancho Medical Group Portal - druglist.info. Drugs (Just Now) Rancho Medical Group is a group practice with 1 location. Currently, Rancho Medical Group specializes in Family Medicine with 2 physicians.Rancho Medical Group Office Locations.Rancho Medical Group. 8112 Milliken Ave Ste 100 Rancho Cucamonga, CA 91730 (909) 466-6410..