Dr. W. Cannon LewisDr. Cannon Lewis earned his Bachelor of Arts in Philosophy and Biology from Rice University. He attended medical school at Baylor College of Medicine in Houston, TX on a scholarship from the United States Air Force. After general surgery residency training in San Antonio, he traveled to Connecticut for fellowship training in colon & rectal surgery.

He served proudly in the USAF for 18 years, then Lt. Col. Lewis returned to San Antonio to enter private practice in 2012. He maintains a busy practice in General Surgery and Colorectal Surgery. Currently, he is a Fellow in both the American College of Surgeons and the American Society of Colon and Rectal Surgeons.


  • Undergraduate — Rice University, Houston, Texas
  • Medical — Baylor College of Medicine, Houston, Texas
  • Residency — Wilford Hall Medical Center/UTHSCSA, San Antonio, Texas
  • Fellowship — Colon & Rectal Surgery, St. Francis Hospital, Hartford, Connecticut

Clinical Interests

  • Diagnostic and Therapeutic Colonoscopy
  • Benign and Malignant Anorectal Disease
  • Pelvic Organ Prolapse -Fecal Incontinence
  • Constipation
  • Benign and Malignant Colon Disease
  • Inflammatory Bowel Disease
  • Minimally Invasive Colorectal Surgery
  • Robotic Surgery