Departments and specialties

Mayo Clinic has one of the largest and most experienced practices in the United States, with campuses in Arizona, Florida and Minnesota. Staff skilled in dozens of specialties work together to ensure quality care and successful recovery.

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Displaying 11-20 out of 21 doctors available

  1. Michele D. Lewis, M.D.

    Michele D. Lewis, M.D.

    1. Gastroenterologist
    1. Jacksonville, FL
    Areas of focus:

    Upper endoscopy, Colonoscopy, Flexible sigmoidoscopy, PEG-J tube placement, Variceal band ligation, Endoscopic biopsy, ...Pancreatitis, Cystic fibrosis, Genetic disorder, Pancreatic cyst, Pancreatic insufficiency, Pancreatic disorder

  2. George W. Marek, III, M.D., Ph.D.

    George W. Marek, III, M.D., Ph.D.

    1. Gastroenterologist
    1. Rochester, MN
    Areas of focus:

    Bravo capsule pH test, Colonoscopy, Flexible sigmoidoscopy, Esophageal dilation, Polypectomy, Esophagoscopy, Diagnostic... endoscopy, Gastroesophageal reflux disease, Diarrhea, Celiac disease, Irritable bowel syndrome, Fructose intolerance, Helicobacter pylori infection, Constipation, Colon polyps, Lactose intolerance, Esophageal stricture, Peptic ulcer, Alpha-1-antitrypsin deficiency, Malabsorption, Pelvic floor defecatory dysfunction, Ehlers-Danlos syndrome, Gastritis, Alpha-gal allergy, Bile acid malabsorption

  3. Kellie L. Mathis, M.D.

    Kellie L. Mathis, M.D.

    1. General Surgeon
    2. Colon and Rectal Surgeon
    1. Rochester, MN
    Areas of focus:

    Anorectal surgery, Coloanal anastomosis, Low anterior resection, Colonoscopy, Laparoscopic surgery, Ileoanal anastomosi...s surgery, Flexible sigmoidoscopy, Colostomy, Ileostomy surgery, Colorectal surgery, Minimally invasive surgery, Robotic surgery, Anoscopy, Rectovaginal fistula repair, Rectal cancer surgery, Colon cancer surgery, Colectomy, Intraoperative radiation therapy, Rectal prolapse surgery, Proctectomy, Small bowel resection, Minimally invasive intestinal surgery, Bowel resection, Digital rectal exam, Pelvic floor dysfunction, Colon cancer, Inflammatory bowel disease, Rectal cancer, Anorectal abnormality, Familial adenomatous polyposis, Ulcerative colitis, Diverticulitis, Crohn's disease, Constipation, Pouchitis, Ileostomy, Colon polyps, Anal fissure, Lynch syndrome, Fistula, Anal fistula, Vaginal fistula, Pelvic floor defecatory dysfunction, Anal cancer, Carcinoid tumor, Polyp, Tubular colon adenoma, Polyposis syndromes, Recurrent cancer, Anorectal disease, Hemorrhoids, Abscess

  4. Nimesh D. Naik, M.D.

    Nimesh D. Naik, M.D.

    1. Colon and Rectal Surgeon
    1. Phoenix, AZ
    Areas of focus:

    Anorectal surgery, Coloanal anastomosis, Colonoscopy, Ileal conduit surgery, Laparoscopic surgery, Ileoanal anastomosis... surgery, Flexible sigmoidoscopy, Colostomy, Ileostomy surgery, Colorectal surgery, Minimally invasive surgery, Complex oncologic multidisciplinary pelvic surgery, Robotic surgery, Rectal cancer surgery, Ileal conduit management, Colectomy, Intraoperative radiation therapy, Colostomy reversal, Rectal prolapse surgery, Proctectomy, Transanal minimally invasive surgery, Colon cancer, Inflammatory bowel disease, Rectal cancer, Familial adenomatous polyposis, Pelvic organ prolapse, Ulcerative colitis, Diverticulitis, Rectovaginal fistula, Crohn's disease, Perianal abscess, Colon polyps, Anal fissure, Lynch syndrome, Diverticular disease, Anal fistula, Anal cancer, Polyposis syndromes, Hemorrhoids, Anal squamous cell carcinoma, Colovesical fistula, Recurrent rectal cancer

  5. Philip N. Okafor, M.D.

    Philip N. Okafor, M.D.

    1. Gastroenterologist
    1. Jacksonville, FL
    Areas of focus:

    Upper endoscopy, Colonoscopy, Flexible sigmoidoscopy, Fecal transplant, Capsule endoscopy, Fecal incontinence, Chronic ...constipation, Gastroesophageal reflux disease, Irritable bowel syndrome, Anemia, Helicobacter pylori infection, Polyp, Chronic diarrhea

  6. William C. Palmer, M.D.

    William C. Palmer, M.D.

    1. Gastroenterologist
    1. Jacksonville, FL
    Areas of focus:

    Upper endoscopy, Colonoscopy, Flexible sigmoidoscopy, Gastrointestinal disorder, Liver disease, Hemochromatosis, Iron o...verload

  7. Gui Piovezani Ramos, M.D.

    Gui Piovezani Ramos, M.D.

    1. Gastroenterologist
    1. Phoenix, AZ
    Areas of focus:

    Upper endoscopy, Colonoscopy, Flexible sigmoidoscopy, Microscopic colitis, Ulcerative colitis, Crohn's disease, Immune-...related adverse event

  8. Lindsey A. Russell, M.D.

    Lindsey A. Russell, M.D.

    1. Gastroenterologist
    2. Nutrition Specialist
    1. Jacksonville, FL
    Areas of focus:

    Upper endoscopy, Colonoscopy, Flexible sigmoidoscopy, PEG-J tube placement, Capsule endoscopy, Nasogastric tube inserti...on, PEG tube placement, Double balloon enteroscopy, Small bowel stricture dilation, Celiac disease, Microscopic colitis, Short bowel syndrome, High output ileostomy, Malnutrition, Malabsorption, Pancreatic insufficiency

  9. Dennis L. Shung, M.D., Ph.D.

    Dennis L. Shung, M.D., Ph.D.

    1. Gastroenterologist
    1. Rochester, MN
    Areas of focus:

    Upper endoscopy, Colonoscopy, Flexible sigmoidoscopy, Gastrointestinal bleeding

  10. Hugo E. Vargas, M.D.

    Hugo E. Vargas, M.D.

    1. Gastroenterologist
    2. Transplant Hepatologist
    1. Phoenix, AZ
    Areas of focus:

    Colonoscopy, Flexible sigmoidoscopy, Esophagoscopy, Hepatocellular carcinoma, Cirrhosis, Hepatitis C, Hepatitis B, Port...al hypertension, Hemochromatosis, Alcoholic hepatitis, Alagille syndrome

July 09, 2024
  1. Flexible sigmoidoscopy. National Institute of Diabetes and Digestive and Kidney Diseases. https://www.niddk.nih.gov/health-information/diagnostic-tests/flexible-sigmoidoscopy. Accessed April 17, 2024.
  2. Sigmoidoscopy. American Society of Clincal Oncology. https://www.cancer.net/navigating-cancer-care/diagnosing-cancer/tests-and-procedures/sigmoidoscopy. Accessed April 17, 2024.
  3. Davidson KW, et al. Screening for Colorectal Cancer: U.S. Preventive Services Task Force Recommendation Statement. JAMA. 2021; doi:10.1001/jama.2021.6238.
  4. Shaukat A, et al. ACG clinical guidelines: Colorectal cancer screening 2021. American Journal of Gastroenterology. 2021; doi:10.14309/ajg.0000000000001122.
  5. Medical review (expert opinion). Mayo Clinic. May 3, 2024.

Flexible sigmoidoscopy