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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 1-2 out of 2 doctors available

Last Name Initial: M

  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

Research

Mayo Clinic researchers continually study new diagnosis and treatment options for people with all types of gastrointestinal conditions, including hemorrhoids.

Publications

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

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Aug. 23, 2025