Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Dr. Justin Stephen Treat, DO

Individual provider Allergy & Immunology Physician · NPI 1801826516

Dr. Justin Stephen Treat, DO is an Allergy/Immunology in Portland, Oregon. Graduated from Arizona College of Osteopathic Medicine Mid Western University in 2003, 23 years ago. Practices with Kaiser Foundation Health Plan of the Northwest, a 1,811-clinician group and accepts Medicare assignment. Licensed in Oregon.

Years since qualifying
23
Trained at
Arizona College of Osteopathic Medicine Mid Western University
Licensed in
OR
In the registry since
2006
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

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Practice location Address checks out

3600 N Interstate Ave
Portland, OR 97227-1106
Phone: (503) 612-3375
Fax: (503) 612-3376
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Allergy & Immunology Physician (primary) Taxonomy 207K00000X · Licence DO26495 (OR)

Record details

NPI number1801826516
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedJuly 5, 2006
Last updated in NPPESApril 20, 2022
Certification dateApril 20, 2022

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyALLERGY/IMMUNOLOGY
Medical schoolARIZONA COLLEGE OF OSTEOPATHIC MEDICINE MID WESTERN UNIVERSITY
Graduated 2003 (23 years in practice)
Group practice Kaiser Foundation Health Plan Of The Northwest — 1811 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations5 on file with Medicare

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