Call came in May 6th. Caller ID showed Express Scripts but was blocked as as Robo call. I called their toll free number today not related to the earlier call but I asked what number calls about prescriptions would come in from. They gave me an 877 number so I am not sure if this number is legitimate or not. I did not have this number in front of me when I called but looked it up in my call log after I ended my call to them.