Summary

Dr. Joseph Ahn is a gastroenterologist and internal medicine physician with 26 years of experience treating digestive system disorders and providing comprehensive adult care. He earned his medical degree from Northwestern University Feinberg School of Medicine and completed his residency at the University of Chicago Medicine. Dr. Ahn speaks both English and Spanish, helping him serve a diverse patient population.

Dr. Ahn practices at Oregon Health and Science University Hospital in Portland, Oregon, along with affiliations at Evanston Hospital, Highland Park Hospital, and OHSU Doernbecher Children's Hospital. His expertise includes treating serious liver conditions such as cirrhosis and nonalcoholic fatty liver disease, as well as managing hepatitis B infections. He performs essential diagnostic procedures including colonoscopy and upper and lower GI endoscopy to evaluate digestive health concerns. Patients have given him an average rating of 4.0 on Vitals.

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
  • 2 board certifications
  • 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, MDArjun PandaHaley HanselerIvy Carmen Lin
GastroenterologyCritical Care MedicineDiagnostic RadiologyHospice & Palliative Medicine
26 Years of Experience 5 Years of Experience 5 Years of Experience 8 Years of Experience
No Virtual Visit Option No Virtual Visit Option No Virtual Visit Option No Virtual Visit Option
Speaks English, Spanish
Portland , ORStanford , CAPortland , ORPortland , OR
Med School: Northwestern University Feinberg School Of Medicine Med School: George Washington University School Of Medicine & Health Sciences Med School: Oregon Health & Science University School Of Medicine Med School: University Of Arizona College Of Medicine
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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

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.
What languages does Dr. Joseph Ahn speak?
Dr. Joseph Ahn speaks English and Spanish.
Where is Dr. Joseph Ahn's office located?
Dr. Joseph Ahn's office is located at 3181 Sw Sam Jackson Park Rd, Portland, OR, 97239.
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.

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