Regal Express Access (REA) – Regal Medical Group Regal Express Access (REA) Click Here to Log In to REA. Regal Express Access is an easy-to-use, internet-based portal for contracted providers of Regal Medical Group, Lakeside Community Healthcare, ADOC Medical Group, Caduceus Medical Group, and United Care Medical Group. REA will allow you to view the … Continue reading Regal Medical Group Provider Portal Registration