Used Optumrx because I was having so much trouble with pharmacy getting medication. Optumrx proved to be the worst ever. Lied to me about paying cash for a scrip because they couldn't resolve an issue costing me over $500. Every month they screwed up my scripts. Moved to another insurance from Optum RX and AARP/United Health care. All three of them are not worth giving the time of day. They make it MUCH more difficult; as a senior I feel they should be ashamed of themselves.