Cucamonga Valley Medical Group Portal. Health (Just Now) Milliken Medical Center Patient Portal Edailystar.com. (Just Now) Cucamonga Valley Medical Group in Rancho Cucamonga is a highly rated 7777 Milliken Ave., Suite 240, Rancho Cucamonga, CA 91730 (909) 429-2864 . by everyone on our team—from the call center to your physician or extender. Druglist.info ....