Meet Our Doctors Posted on December 13, 2022 by ENT Specialists of Illinois Nicholas A. Lygizos M.D. David L. Walner M.D. Francis A. Casper M.D. Gregory S. Bussell M.D. Katherine K. Hamming M.D. Martin E. Anderson, Jr. M.D. Jordan I. Teitelbaum, D.O. Patrick J. Kennedy, Jr. M.D.