Justin Stephen Treat, DO
Allergy & Immunology Physician · Portland, OR
Justin Stephen Treat, DO is an allergy & immunology physician with a practice address in Portland, Oregon, and NPI 1801826516, issued on Jul 5, 2006. Check the license (Oregon DO26495, as entered in NPPES) on the Oregon Medical Board; the Medicare figures below come from public CMS files.
- Name
- Justin Stephen Treat
- Credential
- DO
- Primary taxonomy
- Allergy & Immunology Physician 207K00000X
- License number
- DO26495 OR
Self-reported in NPPES; status is on the state search - Practice location
- 3600 N Interstate Ave, Portland, OR 97227
- Phone
- (503) 612-3375
- Enumerated
- Jul 5, 2006
- Record last updated
- Apr 20, 2022
- Fax
- (503) 612-3376
- Medicare enrollment
- Enrolled (PECOS I20061006000007); accepts Medicare assignment
- Medical or professional school
- Arizona College Of Osteopathic Medicine Mid Western University, 2003
- Entity
- Type 1 · individual
8 nearest allergy & immunology physician records → All 43 in Oregon → Look up another NPI →
Also registered at 3600 N Interstate Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Shareen BakerOptician1851488373
- Christine Barnett, M.D.Hematology & Oncology Physician1679772743
- Lane Barton, MDPhysical Medicine & Rehabilitation Physician1114036746
Verify Justin Stephen Treat in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersOregon Medical Board
Search for license DO26495Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
51% more Medicare Part D claims than the average allergy & immunology physician in 2024
1,117 Medicare Part D claims for 402 beneficiaries, against an average of 741 among the 2,899 providers of this specialty who prescribed in Part D. Brand-name drugs were 20% of claims.
Most prescribed
- Azelastine Hcl276 claims
- Ipratropium Bromide227 claims
- Montelukast Sodium97 claims
- Alvesco75 claims
- Fluticasone Propionate54 claims
- Wixela Inhub51 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Kaiser Foundation Health Plan OF The NorthwestClackamas, OR
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Justin Stephen Treat among 43 allergy & immunology physician records in Oregon
Justin Stephen Treat, DO is one of 43 allergy & immunology physician records with a practice address in Oregon. 70% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 19% of them.
- NPI issued2006 · 19% of these records are older, 40% newer
- In a Medicare fileYes · 70% of these records are
- In the CMS Doctors and Clinicians fileYes · 53% of these records are
- Graduated2003 · median 2005 among the 23 with a school on file
- Record last updated2022 · 63% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207K00000X and a Oregon practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Allergy & Immunology Physician providers in Oregon
There are 43 allergy & immunology physician records in Oregon.
All 43 in Oregon → Every provider in Portland → Allergy & Immunology Physician nationwide →
The 8 allergy & immunology physician records with the nearest ZIP codes
- Kenneth Ettinger, M.D.Portland, OR 972271972617330
- James Baker, MDPortland, OR 972231710982293
- Michael Barrett, M.D.Tigard, OR 972231497868145
- Julie Hong, M.D.Portland, OR 972231609093871
- Michael Noonan, MDPortland, OR 972231124166244
- Michael Osborne, M.D.Portland, OR 972211225196421
- Karen Anstey, M.D.Portland, OR 972391457791261
- Emil Bardana, MDPortland, OR 972391629175443
Common questions
What is Justin Stephen Treat, DO's NPI number?
Justin Stephen Treat, DO's National Provider Identifier (NPI) is 1801826516, issued on Jul 5, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Justin Stephen Treat, DO located?
The NPPES record lists a practice address at 3600 N Interstate Ave, Portland, OR, 97227. Phone: (503) 612-3375. Providers update this record themselves, so call before visiting.
How can I verify Justin Stephen Treat, DO's license?
NPPES lists Oregon license number DO26495, as entered by the provider. Search the Oregon Medical Board at https://www.oregon.gov/OMB/Pages/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Justin Stephen Treat, DO prescribe under Medicare Part D?
In 2024, Justin Stephen Treat, DO had 1,117 Medicare Part D claims for 402 beneficiaries; the average among allergy & immunology physician prescribers was 741. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.