John G Touzios MDDr. John G. Touzios

Practice Philosophy

“The best interest of the patient is the only interest to be considered…” -William J. Mayo

Clinical Interests

Colon, Rectal, and Anal Surgery; Colon Cancer; Rectal Cancer; Inflammatory Bowel Disease; Ulcerative Colitis and Crohn’s Disease; Diverticular Disease; Benign Anorectal Disease; Hemorrhoids; Fissures; Fistula; Fecal Incontinence; Minimally Invasive Surgery; Robotic Colorectal Surgery, and Colonoscopy.


Medical Education

  • M.D., Northwestern University, Chicago, IL, 2001


  • General Surgery, Medical College of Wisconsin and Affiliated Hospitals, Milwaukee, WI, 2008


  • Colon and Rectal Surgery, Mayo Clinic, Rochester, MN, 2009

Professional Appointments

  • Medical Director, Colorectal Surgery Services, ProHealth Care

Board Certified

  • Colon and Rectal Surgery
  • General Surgery

Medical Organizations

  • American Society of Colon and Rectal Surgeons – Fellow
  • American College of Surgeons – Fellow
  • Wisconsin Surgical Society
  • Wisconsin Medical Society
  • Priestley Society, Mayo Clinic
  • Milwaukee Surgical Society
  • Milwaukee Academy of Surgery

Professional Awards

  • Top Doctors 2015, 2016, 2018, 2020, 2022, 2023 (Milwaukee Magazine)

Office Locations

Waukesha Surgical Specialists

1111 Delafield St., Suite 209
Waukesha, WI 53188

Mukwonago D.N. Greenwald Center

240 Maple Ave.
Mukwonago, WI 53149

ProHealth Medical Group Brookfield

195 Discovery Drive
Brookfield, WI 53045

Staff Privileges

  • ProHealth Waukesha Memorial Hospital
  • ProHealth Waukesha Memorial Hospital Mukwonago
  • ProHealth Oconomowoc Memorial Hospital
  • ProHealth Moreland Surgery Center
  • ProHealth Rehabilitation Hospital of Wisconsin

Hobbies/Personal Interests

  • Dr. Touzios enjoys spending time with his wife and four children. They love going on vacation together, golfing, making family meals together and going on fun adventures around the Milwaukee area.