> > > > Dr. Mark O'Hollaren, MD
Dr. Mark Thomas O'Hollaren MD is a male Allergist & Immunologist, has 30 years of experience and practices in Allergy & Immunology, Allergy, and Internal Medicine.
Dr. Mark O'Hollaren has 1 office location.
Allergy Clinic
511 SW 10th Ave
Ste 1301
Portland, OR 97205

Phone Number
Locations and availability (1)
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).

Learn more about Dr. Mark O'Hollaren:

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  1. Qualifications
  2. What's important to you

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Patient Reviews

4.0
  • Currently 4 of 4 stars
(1)
Patient comments (0)

The overall average patient rating of Dr. Mark O'Hollaren is Excellent. Dr. O'Hollaren has been reviewed by 1 patients who have provided 0 comments. The rating is 4 out of 4 stars.

Patient Ratings
Ease of Appointment 2.0
  • Currently 2 of 4 stars
Promptness 2.0
  • Currently 2 of 4 stars
Courteous Staff 3.0
  • Currently 3 of 4 stars
Accurate Diagnosis 4.0
  • Currently 4 of 4 stars
Bedside Manner 4.0
  • Currently 4 of 4 stars
Spends Time with Me 4.0
  • Currently 4 of 4 stars
Follows Up After Visit 4.0
  • Currently 4 of 4 stars

Specialties & Research

Dr. Mark O'Hollaren, MD is board certified in Allergy & Immunology and Internal Medicine.

  • He has special expertise in 3 areas:
  • Asthma
  • Food Allergy (Hypersensitivity)
  • Nasal Allergy (Rhinitis)

Education & Awards

Dr. O'Hollaren graduated from Oregon Health & Science University, Portland. He has 2 awards.

Awards  
Castle Connolly's Top Doctors™ (2013)
Top Ten Doctors (2012)
Internal Medicine, Downtown Portland, Portland, OR

Affiliations

Dr. O'Hollaren has 3 hospital affiliations:

  • Providence St Vincent Medical Center 
  • Oregon Health & Science Univ H, Portland, Or 
  • Oregon Health Science University 

Accepted Insurance Plans

Dr. O'Hollaren accepts these health insurances in at least one office:

  • Providence Health Plan - 21 plans
  • United Healthcare - 12 plans
  • Regence Blue Cross Blue Shield - 6 plans
  • Great-West Healthcare - 2 plans
  • ODS Health Plans - 4 plans
  • Evercare - 1 plan
  • Humana - 6 plans
  • Cigna - 4 plans
  • Aetna - 2 plans

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Additional Information
Where does Dr. Mark T. O'Hollaren practice?
Dr. Mark O'Hollaren practices Allergy & Immunology, Allergy, and Internal Medicine near Portland, OR.
See Portland Allergists and Portland Internists.