Patient Portal. If you already have a MyChart account, you can log in here. ... Need help? If you are having trouble setting up your account, call 866-273-1966. ... Patient Portal; Clinical Trials; Division of Rheumatology. Washington University School of Medicine. Mailing Address: 660 S. Euclid Ave. MSC: 8045-0043-15. St. Louis, MO 63110 ....