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 21-30 out of 43 doctors available

  1. Umair Majeed, M.B.B.S., M.D.

    Umair Majeed, M.B.B.S., M.D.

    1. Oncologist
    2. Hematologist
    1. Jacksonville, FL
    Areas of focus:

    Chemotherapy for colon cancer, Colon cancer, Liver cancer, Hepatocellular carcinoma, Pancreatic cancer, Rectal cancer, ...Stomach cancer, Cholangiocarcinoma, Esophageal cancer, Gallbladder cancer, Anal cancer, Stage 4 colorectal cancer

  2. 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

  3. 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

  4. Amit Merchea, M.D.

    Amit Merchea, M.D.

    1. Surgical Oncologist
    2. Colon and Rectal Surgeon
    1. Jacksonville, FL
    Areas of focus:

    Colostomy, Rectal cancer surgery, Colon cancer surgery, Chemotherapy for colon cancer, PIPAC, Colon cancer, Rectal canc...er, Ulcerative colitis, Crohn's disease, Anal fistula

  5. Nitin Mishra, M.B.B.S., M.P.H.

    Nitin Mishra, M.B.B.S., M.P.H.

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

    Laparoscopic surgery, Colostomy, Colorectal surgery, Robotic surgery, Rectal cancer surgery, Colon cancer surgery, Intr...aoperative radiation therapy, Colon cancer, Inflammatory bowel disease, Rectal cancer, Rectal prolapse, Anal fistula

  6. 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

  7. Donald W. Northfelt, M.D.

    Donald W. Northfelt, M.D.

    1. Internist
    2. Oncologist
    1. Phoenix, AZ
    Areas of focus:

    Bone marrow biopsy and aspiration, Colon cancer, Breast cancer, Rectal cancer, Lymphoma, Rhabdomyosarcoma, Sarcoma, Con...genital blood clotting disorder

  8. Conor D. O'Donnell, M.B., B.Ch., B.A.O.

    Conor D. O'Donnell, M.B., B.Ch., B.A.O.

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

    Chemotherapy for colon cancer, Colon cancer, Hepatocellular carcinoma, Pancreatic cancer, Rectal cancer, Stomach cancer..., Cholangiocarcinoma, Esophageal cancer, Anal cancer

  9. Katrina S. Pedersen, M.D.

    Katrina S. Pedersen, M.D.

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

    Chemotherapy for colon cancer, Colon cancer, Rectal cancer, Anal cancer, Appendix cancer, Small bowel cancer, Young-ons...et rectal cancer, Young-onset colon cancer

  10. William R. G. Perry, M.B., Ch.B., M.P.H.

    William R. G. Perry, M.B., Ch.B., M.P.H.

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

    Colorectal surgery, Rectal cancer surgery, Colon cancer surgery, Pelvic floor dysfunction, Colon cancer, Inflammatory b...owel disease, Rectal cancer, Ulcerative colitis, Crohn's disease, Rectal prolapse, Pelvic floor defecatory dysfunction, Recurrent cancer

Research

Mayo Clinic doctors and scientists are studying new ways to diagnose and treat rectal cancer. Learn more about gastrointestinal cancer research.

Cancer research is conducted in coordination with Mayo Clinic Comprehensive Cancer Center. Mayo Clinic Comprehensive Cancer Center receives funding from the U.S. National Cancer Institute and is designated as a comprehensive cancer center. This designation recognizes the institution's scientific excellence and multidisciplinary resources focused on cancer prevention, diagnosis and treatment.

Publications

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

Research Profiles

Sept. 12, 2025

Living with rectal cancer?

Connect with others like you for support and answers to your questions in the Colorectal Cancer support group on Mayo Clinic Connect, a patient community.

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