Gastroenterology and Hepatology

Request an Appointment
Referrals

Doctors

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.

Find doctors and medical staff:

Edit search filters
close

Narrow your search

  1. Find a doctor whose last name begins with the letter A
  2. Find a doctor whose last name begins with the letter B
  3. Find a doctor whose last name begins with the letter C
  4. Find a doctor whose last name begins with the letter D
  5. Find a doctor whose last name begins with the letter E
  6. Find a doctor whose last name begins with the letter F
  7. Find a doctor whose last name begins with the letter G
  8. Find a doctor whose last name begins with the letter H
  9. Find a doctor whose last name begins with the letter I
  10. Find a doctor whose last name begins with the letter J
  11. Find a doctor whose last name begins with the letter K
  12. Find a doctor whose last name begins with the letter L
  13. Find a doctor whose last name begins with the letter M
  14. Find a doctor whose last name begins with the letter N
  15. active Find a doctor whose last name begins with the letter O
  16. Find a doctor whose last name begins with the letter P
  17. There are no doctors whose last name begins with the letter Q
  18. Find a doctor whose last name begins with the letter R
  19. Find a doctor whose last name begins with the letter S
  20. Find a doctor whose last name begins with the letter T
  21. Find a doctor whose last name begins with the letter U
  22. Find a doctor whose last name begins with the letter V
  23. Find a doctor whose last name begins with the letter W
  24. There are no doctors whose last name begins with the letter X
  25. Find a doctor whose last name begins with the letter Y
  26. There are no doctors whose last name begins with the letter Z
Reset all filters

Displaying 1-4 out of 4 doctors available

Last Name Initial: O

  1. 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

  2. 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

  3. Jody C. Olson, M.D.

    Jody C. Olson, M.D.

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

    Hepatocellular carcinoma, Cirrhosis, Alcoholic liver disease, Hepatitis C, Hepatitis B, Primary biliary cholangitis, Pr...imary sclerosing cholangitis, Wilson's disease, Portal hypertension, Autoimmune hepatitis, Polycystic liver disease, Hemochromatosis, Alcoholic hepatitis, Hepatopulmonary syndrome, Fontan-associated liver disease

  4. Amy S. Oxentenko, M.D.

    Amy S. Oxentenko, M.D.

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

    Celiac disease, Malabsorption syndrome, Gastrointestinal disorder, Peptic ulcer, Gastritis

Learn more about the Mayo Clinic Department of Gastroenterology and Hepatology location nearest you:

Request an appointment
Conditions treatedDoctors by location and specialty
Feb. 05, 2026

Mayo Clinic in Rochester, Minnesota, has been recognized as the best Gastroenterology & GI Surgery hospital in the nation by U.S. News & World Report.

Learn more about this top honor

Gastroenterology and Hepatology

Sections