Browse Health
Internist, Infectious Disease Specialist (virus, bacteria, parasites)
31 years of experience
Accepting new patients
License & Identifications

A medical license is required for a doctor to practice medicine in a particular state. Requirements vary by state but most require, at a minimum, post-graduate training in the doctor’s specific specialty. An NPI number is a national identifier unique to an individual health care provider and is managed by the Center for Medicare & Medicaid Services (CMS).

Patient Reviews

Have you visited Dr. O'Hanley? Share your experience.
Write a Review

Specialties & Research

Dr. Peter O'Hanley, MD is board certified in Internal Medicine and Infectious Disease.

  • He has special expertise in 3 areas:
  • Diarrhea
  • E.Coli (Escherichia coli Infections)
  • Hospitalist

Education & Awards

Dr. O'Hanley graduated from Medical University of South Carolina, Charleston.


Dr. O'Hanley has 7 hospital affiliations:

  • Stanford Hospital and Clinics 
  • Providence Milwaukie Hospital 


  • Spanish
  • English

> > > > Dr. Peter O'Hanley, MD

Similar doctors nearby

Dr. Regan Duffy

Internal Medicine
3 years experience
Portland, OR

Dr. Rhonda Tierney

Internal Medicine
8 years experience
Portland, OR

Dr. Shane Rogosin

Internal Medicine
6 years experience
Portland, OR

Dr. Bryan Trueworthy

Emergency Medicine
9 years experience
Portland, OR

Dr. Rachel Sanborn

Internal Medicine
11 years experience
Portland, OR

Dr. Michael Clayton

Internal Medicine
12 years experience
Portland, OR
Search All Similar Doctors
Additional Information
Dr. Peter Donald O'Hanley MD is a male Internist, has 31 years of experience and practices in Internal Medicine and Infectious Disease.
Where does Dr. Peter D. O'Hanley practice?
Dr. Peter O'Hanley has 3 office locations.
Dr. Peter O'Hanley practices Internal Medicine and Infectious Disease near Portland, OR.
Additional practice locations include: Oregon City, OR and Palo Alto, CA.
See Portland Internists and Portland Infectious Disease Doctors.