Faculty
Our clinical faculty is made up of outstanding individuals who are committed to teaching the next generation of surgeons with state-of-the-art medicine while delivering compassionate care to each of our patients.
Our urology faculty comprises six full-time and several adjunct faculty members, three mid-level practitioners, clinical nurses, and administrative staff members. All provide clinical services at SSM Health Saint Louis University Hospital, SSM Health Cardinal Glennon Children’s Hospital and SSM Health St. Mary's Hospital.

Sameer A. Siddiqui, M.D., FACS
Professor, Department Chair
C. Rollins Hanlon Endowed Chair of Department of Surgery
Medical School: University of Missouri- Columbia
Residency: Mayo Clinic
Fellowship: Henry Ford Hospital

Zachary A. Hamilton, M.D.
Associate Professor, Division Chief
Medical School: University of Missouri- Columbia
Residency: University of Kansas- Kansas City
Fellowship: Urologic Oncology at University of California- San Diego

Barry P. Duel, M.D., F.A.A.P., F.A.C.S.
Associate Professor
Medical School: Harvard Medical School
Residency: Harvard Medical School
Fellowship: Wayne State University, School of Medicine

Lindsay Lombardo, D.O.
Assistant Professor
Medical School: Kirksville College of Osteopathic Medicine
Residency: Cook County Health and Hospital System

R. Clay McDonough, M.D.
Assistant Professor
Medical School: Emory University, School of Medicine
Internship: Wilford Hall Medical Center
Residency: Wilford Hall Medical Center
Fellowship: University of Iowa College of Medicine

Timothy Phillips, M.D.
Assistant Professor
Medical School: Uniformed Services University of the Health Sciences
Internship: Wilford Hall Medical Center
Residency: San Antonio Uniformed Services Health Education
Fellowship: Johns Hopkins School of Medicine
