Summary

Dr. Joseph Ahn treats cirrhosis, nonalcoholic fatty liver disease (NAFLD), and hepatitis B, and performs colonoscopy, lower GI endoscopy, and upper GI endoscopy. He practices gastroenterology and internal medicine and has 26 years of experience. He speaks English and Spanish.

Dr. Ahn earned his medical degree from Northwestern University Feinberg School of Medicine and completed his residency at the University of Chicago Medicine. He is affiliated with Oregon Health and Science University Hospital, Evanston Hospital, Highland Park Hospital, and OHSU Doernbecher Children's Hospital, and sees patients in Portland, Oregon, and Evanston, Illinois. Patients on Vitals rate Dr. Ahn 4 out of 5.

Overview based on verified provider data

Quick Facts

  • 4
  • 26 years of experience
  • speaks English, Spanish
  • University Of Chicago Medicine
  • 4 written reviews
  • 2 specialties
  • 9 areas of expertise
  • 5 hospital affiliations
  • 2 office locations
  • Male

Patients’ Perspective

  • Gave an accurate diagnosis
  • Had a good bedside manner
  • Spent time with me

Office Locations

Dr. Joseph Ahn has 2 locations

Oregon Health And Science University Hospital

3181 Sw Sam Jackson Park RdPortland, OR 97239

Evanston Hospital

2650 Ridge AveEvanston, IL 60201

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Dr. Joseph Ahn, MDDr. Michael Paul Shaughnessy JR.Dr. Christina Mehanni, MDDr. Carter Fitzhugh Yeatman II, MD
GastroenterologyDermatologic SurgeryNephrologyNuclear Medicine
Accepts New Patients Accepts New Patients Accepts New Patients
26 Years of Experience 6 Years of Experience 15 Years of Experience 23 Years of Experience
No Virtual Visit Option No Virtual Visit Option No Virtual Visit Option No Virtual Visit Option
Speaks English, Spanish Speaks English Speaks English
Portland , ORPortland , ORTualatin , ORSeattle , WA
Med School: Northwestern University Feinberg School Of Medicine Med School: Tufts University School Of Medicine Med School: Ross University School Of Medicine Med School: Virginia Commonwealth University School Of Medicine
Current Profile
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Insurance Plans Accepted by Dr. Joseph Ahn

Be sure to verify insurance information directly with your doctor's office, as it may undergo frequent changes.

Medical Specialties

Dr. Joseph Ahn has the following 2 specialties

Specialty Expertise

Dr. Joseph Ahn has the following 9 areas of expertise

  • Acid Reflux Disease (Gastroesophageal Reflux / GERD)
  • Constipation
  • Hepatitis
  • Hepatitis B
  • Hepatitis C
  • Internal Medicine
  • Irritable Bowel Syndrome (IBS)
  • Ulcerative Colitis
  • Viral Human Hepatitis

Certifications, License, & Education

26 Years Experience

Dr. Joseph Ahn holds an expired medical license in the state of Illinois.

Medical License

Medical Doctor with an expired medical license in the state of Illinois that expired in 2026.

Education & Training

Residency

Completed their residency at University Of Chicago Medicine.

Medical School

Graduated from Northwestern University Feinberg School Of Medicine in 2000.

NPI Number

Dr. Ahn's NPI number is 1497770416.

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Frequently Asked Questions

Is Dr. Joseph Ahn accepting new patients?
Dr. Joseph Ahn has not indicated that they accept new patients. Contact their office through their Vitals profile to check for availability.
How can I make an appointment with Dr. Joseph Ahn?
You can find contact information for Dr. Joseph Ahn here on Vitals.
Does Dr. Joseph Ahn accept my insurance?
You can see the insurance plans that Dr. Joseph Ahn accepts on their Vitals profile.
Which hospitals is Dr. Joseph Ahn affiliated with?
Dr. Joseph Ahn is affiliated with Oregon Health And Science University Hospital, Evanston Hospital, Highland Park Hospital, Ohsu Doernbecher Childrens Hospital, and Evanston Hospital.
What languages does Dr. Joseph Ahn speak?
Dr. Joseph Ahn speaks English and Spanish.

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