Theresa Hayssen, MD - General & Vascular Surgery - Ascension Wisconsin

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Patient Rating
4.8 / 5 (Based on 46 Reviews)

Theresa Hayssen, MD

Specialties: General Surgery, Vascular Surgery, Robotic Surgery, Colorectal Surgery
"My practice concentrates on the surgical management of colon and rectal diseases. I believe it is important to treat the disease as it relates to the health of the whole person. First is listening to and educating patients. Sometimes the best approach is non-surgical; when surgery is needed, I strive to offer the most advanced and proven surgical option. Always, my goal is to achieve the best possible outcome for my patients."
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Accepting new patients.


Clinical Interests

  • Colonoscopy
  • Hemorrhoid Surgery
  • Colorectal Cancer Surgery
  • Colon Cancer Screening
  • Benign and Malignant Diseases of the Rectum and Anus
  • Diverticular Disease
  • Minimally Invasive Surgery
  • Anorectal Disorders/Procedures
  • Inflammatory Bowel Diseases
  • Incontinence
  • Colon Polyps/Colon Cancer
  • Pelvic Floor Abnormalities
  • Robotic Assisted Surgery


  • English


  • St. Francis
  • Elmbrook Memorial
  • Franklin


  • Medical School
    1992 Southern Illinois University School of Medicine, Springfield, Illinois
  • Residency
    1997 Southern Illinois University School of Medicine, Springfield, Illinois
  • Fellowship
    1998 Ferguson Clinic, Grand Rapids, Michigan


  • General Surgery
  • Colon & Rectal Surgery