Colonoscopy

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Displaying 61-70 out of 85 doctors available

  1. 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

  2. Nicholas P. McKenna, M.D., M.S.

    Nicholas P. McKenna, M.D., M.S.

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

    Anorectal surgery, Low anterior resection, Colonoscopy, Laparoscopic surgery, Ileoanal anastomosis surgery, Hemorrhoide...ctomy, Hemorrhoidal banding, Colostomy, Ileostomy surgery, Colorectal surgery, Minimally invasive surgery, Robotic surgery, Rectal cancer surgery, Colon cancer surgery, Colectomy, Proctectomy, Small bowel resection, Sacral nerve stimulation for fecal incontinence, Bowel resection, Colon cancer, Inflammatory bowel disease, Rectal cancer, Familial adenomatous polyposis, Ulcerative colitis, Diverticulitis, Crohn's disease, Ileostomy, Perianal abscess, Colon polyps, Anal fissure, Anal fistula, Anal cancer, Polyposis syndromes, Anorectal disease, Hemorrhoids, Anal squamous cell carcinoma

  3. 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

  4. Nicholas R. Oblizajek, M.D.

    Nicholas R. Oblizajek, M.D.

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

    Colonoscopy, Endoscopic procedure, Anorectal manometry, Esophagoscopy, Breath testing, Anorectal function testing, Pelv...ic floor dysfunction, Gastroesophageal reflux disease, Diarrhea, Functional dyspepsia, Constipation, Gastroparesis, Functional bowel disorder

  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. Maoyin Pang, M.D., Ph.D.

    Maoyin Pang, M.D., Ph.D.

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

    Bravo capsule pH test, Upper endoscopy, Colonoscopy, Flexible bronchoscopy, Dysphagia, Gastroesophageal reflux disease,... Heartburn, Achalasia, Eosinophilic esophagitis, Esophagitis, Esophageal stricture, Esophageal spasms

  8. Shabana F. Pasha, M.D.

    Shabana F. Pasha, M.D.

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

    Upper endoscopy, Colonoscopy, Balloon-assisted enteroscopy, Capsule endoscopy, Colon cancer, Inflammatory bowel disease..., Gastrointestinal bleeding

  9. Varan Perananthan, M.D., Ph.D.

    Varan Perananthan, M.D., Ph.D.

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

    Upper endoscopy, Esophageal reflux scan, Colonoscopy, Esophageal manometry, Endoscopic mucosal resection, Endoscopic di...lation, Dysphagia, Lichen planus, Gastroesophageal reflux disease, Achalasia, Eosinophilic esophagitis, Barrett's esophagus, Esophageal cancer, Colon polyps, Zenker's diverticulum, Eosinophilic gastroenteritis, Esophageal cyst, Barrett's esophagus with dysplasia

  10. 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

Research

Mayo Clinic researchers are advancing the science and practice of colonoscopy to improve detection, preparation, comfort and outcomes for people undergoing colorectal cancer screening or evaluation of colonic conditions.

Mayo Clinic Comprehensive Cancer Center meets the strict standards for a U.S. National Cancer Institute comprehensive cancer center. These standards recognize scientific excellence and a multispecialty approach focused on cancer prevention, diagnosis and treatment.

Mayo Clinic is conducting numerous clinical trials that explore new tools, technologies and approaches in colonoscopy and related areas.

Publications

See a list of publications about colonoscopy by Mayo Clinic doctors on PubMed, a service of the National Library of Medicine.

Research Profiles

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By Mayo Clinic Staff

Colonoscopy care at Mayo Clinic

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AboutCare at Mayo Clinic
Feb. 06, 2026
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  1. U.S. Preventive Services Task Force. Screening for colorectal cancer: U.S. Preventive Services Task Force Recommendation Statement. JAMA. 2021; doi:10.1001/jama.2021.6238.
  2. Gupta S, et al. Recommendations for follow-up after colonoscopy and polypectomy: A consensus update by the U.S. Multi-Society Task Force on Colorectal Cancer. Gastroenterology. 2020; doi:10.1053/j.gastro.2019.10.026.
  3. Colorectal cancer early detection, diagnosis, and staging. https://www.cancer.org/cancer/types/colon-rectal-cancer/detection-diagnosis-staging.html. American Cancer Society. Accessed Jan. 16, 2026.
  4. A-Rahim YI, et al. Bowel preparation before colonoscopy in adults. https://www.uptodate.com/contents/search. Accessed Jan. 16, 2026.
  5. Colonoscopy. National Institute of Diabetes and Digestive and Kidney Diseases. https://www.niddk.nih.gov/health-information/diagnostic-tests/colonoscopy. Accessed Jan. 16, 2026.
  6. Lee L, et al. Overview of colonoscopy in adults. https://www.uptodate.com/contents/search. Accessed Jan. 16, 2026.
  7. Knudsen AB, et al. Colorectal cancer screening: An updated modeling study for the U.S. Preventive Services Task Force. JAMA. 2021; doi:10.1001/jama.2021.5746.
  8. Colonoscopy. American College of Gastroenterology. https://gi.org/topics/colonoscopy/. Accessed Jan. 16, 2026.
  9. American Society for Gastrointestinal Endoscopy. Guidelines for endoscopy in pregnant and lactating women. Gastrointestinal Endoscopy. 2012; doi:10.1016/j.gie.2012.02.029.
  10. Can you have a colonoscopy when you're menstruating? International Center for Global Health Information. https://www.icgi.org/can-you-have-a-colonoscopy-if-youre-menstruating/. Accessed Jan. 16, 2026.
  11. Health Education & Content Services. About your colonoscopy. Mayo Clinic; 2018.

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Colonoscopy