Led by Dr. Felix Tiongco and Dr. Shoba Mendu, our research division offers patients new GI disease medications made only available through research protocols. Learn More. Locations. 112 Gainsborough Square Suite 200 Chesapeake, VA 23320. ... Send a secure online direct message by visiting our Patient Portal. Patients can also make appointments ...About Us‧Contact Us‧Procedures‧Patient Forms‧Patient Information‧Research.