Advocate Illinois Masonic Medical Center
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Meet Our Team

Andrew Albert, MD Frank J. Konicek Jr., MD
Dzifaa Kofi Lotsu, MD Ilysa R. Diamond, MD
Michael Scott Flicker, MD William Simon Markey, MD
Keikhosrow Ghazanfari, MD Arun Ohri, MD
Arturo Olivera Jr., MD
  • George N. Atallah Atia, MD
  • Melchor Valdez Demetria, MD
  • Brian Robert Boulay, MD
  • David C. Chua, MD
  • Lawrence E. Gluskin, MD
  • Allan G. Halline, MD
  • Afreen Anjum Hyder, MD
  • Michael Issam Maitar, MD
  • Anthony P. Merza, MD
  • Amritbhai P. Patel, MD
  • Stephen T. Steiner, MD

Colon and Rectal Surgery

Joaquin Estrada, MD

Find a gastroenterologist.

Contact Us
To learn more, for help finding a physician or to schedule an appointment call 1.800.3.ADVOCATE (1.800.323.8622). You can also find a physician and request an appointment online.


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