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Patrick Brennan, M.D.

Patrick Brennan, M.D.

Personal Info

Dr. Brennan is a Board Certified General surgeon.  He is a graduate of University of Wisconsin Medical School in Madison, Wisconsin, receiving his general surgery and trauma training at Loyola University Medical Center in Maywood, Illinois..

He is a Fellow of the American College of Surgeons, a position that requires devotion to surgical practice and uncompromising adherence to the ethical standards of the College. Fellows must have graduated from a medical school accepted by the College, be certified by the American Board of Medical Specialty, hold an unrestricted medical license to practice, and be a specialist in surgery.


His interests include minimally invasive laparoscopic surgery, robotic surgery, endoscopy, surgical oncology, endocrine surgery, colorectal surgery, thoracic surgery, vascular surgery, endovascular surgery  and emergency trauma care.


  • Minimally invasive laparoscopic surgery
  • Colorectal surgery
  • Robotic Surgery
  • Breast surgery
  • Surgical Oncology
  • Endoscopic Procedures
  • Anti-reflux surgery
  • Emergency Trauma Care
  • Diseases of  the thyroid and parathyroid glands
  • Thoracic Surgery
  • Vascular surgery
  • Endovascular Surgery
  • Radio-frequency ablation of varicose veins


University of Notre Dame 1993

Medical School
University of Wisconsin Medical School, Madison, WI 1997

Loyola University Medical Center, Maywood, IL 1997-1998

Loyola University Medical Center, Maywood, IL 1998-2002

Chief Resident, Loyola University Medical Center, Maywood IL 2002


  • Fellow of the American College of Surgeons
  • American Board of Surgery
  • Wisconsin State Medical License

Hospital Associations/Positions

  • Theda Clark Medical Center, Neenah WI
  • Children’s Hospital of Wisconsin – Fox Valley, Neenah WI
  • Aurora Medical Center, Oshkosh WI


  • American Medical Society
  • Wisconsin Medical Society
  • Wisconsin Surgical Society
  • American Trauma Society


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