Joseph Ahn M.D., M.S., F.A.C.G.

Photo of Joseph Ahn, M.D., M.S., F.A.C.G.
Faculty profile

Associate Professor of Medicine, Division of Gastroenterology and Hepatology School of Medicine

Accepting new patients

4.7 out of 5 (345 Ratings, 34 Comments)


  • Hepatology / Liver Disease
  • Transplantation

Special focus on

  • Abdominal Organ Transplantation and Hepatobiliary Surgery
  • Hepatology
  • Liver Cancer


  • M.D., Northwestern University, Chicago Illinois 0 2000
  • M.S., Northwestern University, Chicago Illinois 0 2006
  • Residency:

    • Internal medicine, University of Chicago Hospitals, Chicago, IL, 2003
  • Fellowship:

    • Gastroenterology and Hepatology, Northwestern University Medical Center, Chicago, IL, 2006
  • Certifications:

    • Internal medicine


Dr. Ahn is the director of clinical hepatology at OHSU. His research interests are hepatitis B, hepatitis C, liver cancer, and liver transplantation. He received his medical degree from Northwestern University and completed his residency in internal medicine at the University of Chicago and his gastroenterology and hepatology fellowship at Northwestern University in Chicago. Dr. Ahn is board certified in internal medicine, gastroenterology, and transplant hepatology. His current research studies include a multi-center trial to study the impact of antiviral therapy for hepatitis B on the development of liver cancer, and multiple studies on new pharmacotherapy for hepatitis C as well as screening and linkage of care for viral hepatitis.

When Dr. Ahn is away from medicine, he enjoys spending time with his family, practicing kendo, hiking, and traveling.

Read more


  • English
  • Korean

Memberships and associations

  • American College of Physicians

Patient Ratings

4.7 out of 5 (345 Ratings, 34 Comments)

The patient ratings score is an average of all responses to physician related questions on our nationally-recognized Press Ganey Patient Satisfaction Survey

  • Friendliness/courtesy 4.8
  • Explanations about your problem/condition 4.8
  • Concern shown for your questions/worries 4.7
  • Effort made to include you in treatment decisions 4.7
  • Used words you could understand 4.8
  • Amount of time spent with you 4.7
  • Your confidence in care provider 4.8
  • Likelihood of recommending to others 4.7
  • Likelihood of recommending to others 4.8

Patient Comments

  • May 29, 2018

    Dr. Joseph Ahn is THE BEST doctor I have ever seen. I would recommend him to family, friends and strangers. You can tell he is highly intelligent while maintaining excellent bedside manner and able to explain things in a way that a person, like me, in a non medical profession, can understand. Every time we leave his office, my husband and I discuss what a great physician he is and how we are so happy we found him.

  • May 27, 2018

    Dr Ahn is one we have confidence and trust in.

  • May 23, 2018

    As previously stated, this was the most arrogant doctor ever met in my life and have met many socially and because of health, he needs training in deportment as conduct is under his control, his contemptuous nature rivals trump, and that he berates staff in front of patient is poor professionalism, it would be not in my interest to ever link to him for any reason.

  • May 22, 2018

    Liver damage due to alcoholism. Treats me with respect when others might not

  • May 16, 2018

    One medication at a larger dose made me itch. I cut the dose in half and e-mailed my doctor of what I had done. He let me know on my next appointment that he did not like the fact that I was doing my own medicating. He tells me what we are going to do about my care. I also had to ask my husband to not come in the room with me because at a previous appointment the doctor looked at him while talking about my care.

  • May 09, 2018

    dr. Anh is one of the best doctor I known. he is so caring, attentive, compassionate and very good st explaining to me in the language I can understand. I already appreciate all you do for me dr. Anh. thank you for taking such a good care of me.

  • Apr 19, 2018

    both Dr. Ahn and his resident were very informative, easy to talk to. Dr. Ahn addressed all of my concerns and explained the pathology of my disease better than any provider before

  • Mar 21, 2018

    Great doctor!!!!

  • Feb 28, 2018

    One of the best doctor's visits I've ever had!

  • Feb 02, 2018

    Dr an is amazing !!!

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