Michael Weisberg MD Gastroenterology • Plano, TX. Physician Join to view full profile. Dr. Weisberg is on Doximity. As a Doximity member you'll join over a million verified healthcare professionals in a private, secure network. ... Plano, TX 75093. Phone (972) 867-0019. Fax (972) 596-8545. Is this information wrong?.