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Welcome to the Department of Surgery

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Colon, Rectum, and Anus

Types of Surgery / GI, Tumor, and Endocrine Division


Note: Most operations listed on this page can be performed with a laparoscopic approach.

Under Construction

This content is coming soon.

Our Board-certified Colorectal Surgeons

Jon Vogel, MD
Jon Vogel, MD


Michelle Cowan, MD
Michelle Cowan, MD


For an appointment, call 303-724-2728

Cancer of the colon or rectum

We treat these cancers at our multidisciplinary clinic.

Inflammatory Bowel Disease (IBD), ulcerative colitis, and Crohn’s disease

More information on Inflammatory Bowel Disease (IBD) is available from the Department of Medicine's Division of Gastroenterology (opens in a new browser tab).

Diverticulitis and other benign colorectal diseases

  • Colectomy
  • Ostomy reversal
  • Colovesicle and colovaginal fistula surgery
  • Enterocutaneous fistula (ECF) surgery
  • Rectal prolapse surgery

Colorectal polyps

Benign anal and rectal conditions

  • Hemorrhoidectomy:
  • Anal fistula surgery:
    • Seton insertion
    • LIFT surgery (Ligation of Inter-sphincteric Fistula Tract)
    • Anal fistula plug insertion
    • Rectal mucosa advancement flap
    • Rectovaginal fistula repair
  • Anal fistulotomy for chronic fissure
  • Anorectal abcess drainage
  • Fecal incontinence surgery
  • Pilonidal cyst and abscess surgery
  • Topical formalin therapy (to control rectal bleeding)
  • Sacral nerve stimulation