NPI registry status
Active
2026 NPPES data Allergy & Immunology Physician NPI 1801826516 DO
Verify on CMS → Justin Treat, DO
Allergy & Immunology Physician in Portland, Oregon.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 3,390 in Allergy & Immunology Physician, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.
Federal data, no proprietary rating.
We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
1K
Medicare Part D claims · 382 beneficiaries · Allergy & Immunology Physician avg: 764
Generic prescribing
75%
generic claims · 25% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2023
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Justin Treat, DO filed 1,206 Medicare Part D claims in 2023 as a Allergy & Immunology Physician in Portland, Oregon, prescribing 75% generic.
- 1K
- Part D claims, 2023
- 75%
- generic prescribing
- Likely
- board-certified (heuristic)
Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) - no proprietary rating or editorial opinion is applied.
Justin Treat, DO's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
1,206 Top 22% higher than 78% of 1,370,886 prescribers
Each bar is a band; taller bars hold more prescribers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source CMS Medicare Part D Prescriber Public Use File · 2023
✓
Board certification likely (heuristic, not verified)
Justin Treat, DO practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 1 hospital affiliation - signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Justin Treat, DO?
Quality data not reportedPrimary specialty
Allergy & Immunology Physician
Medicare Part D claims
1,206 58% vs specialty avg
Specialty distribution in Oregon
How Allergy & Immunology Physician compares to other specialties among Oregon providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Allergy & Immunology Physician. Verify directly:
How MIPS and board certification work
The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.
Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).
Justin Treat, DO appears in the CMS NPPES registry as a Allergy & Immunology Physician provider holding DO credentials at 3600 N INTERSTATE AVE, Portland, OR, 97227, with a listed phone of (503) 612-3375. NPI 1801826516 was issued on 07/05/2006.
Medicare Part D records for calendar year 2023 show 1,206 prescription claims written by this provider, covering 382 Medicare beneficiaries and totaling roughly $921K in drug spend, split 25% brand-name and 75% generic by claim count.
Allergy & Immunology Physician is a narrow specialty nationwide, with 3,390 enrolled providers across 52 states and an average of 764 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline.
Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist, always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.
Practice Address
Provider Details
| NPI | 1801826516 |
|---|---|
| Specialty | Allergy & Immunology Physician |
| Credentials | DO |
| Gender | Male |
| NPI Issued | 07/05/2006 |
Hospital and facility affiliations
Facilities where Justin Treat, DO bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" - a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.
Kaiser Foundation Health Plan OF The Northwest
Clackamas, OR
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
Brand vs generic prescribing mix · Above average
Justin Treat, DO - brand share 25.0%
Allergy & Immunology Physician average
25% brand-name claims vs 75% generic, on 1,206 2023 Medicare Part D claims.
The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
1,206
Total Claims
$921K
Total Drug Cost
382
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 2,144
- Total Day Supply
- 62,162
- Brand vs Generic
- 25% brand / 75% generic
- Brand Drug Cost
- $871K
- Generic Drug Cost
- $49K
- Antibiotic Claims
- 26
Patient Demographics
- Average Patient Age
- 72.1 years
- Avg HCC Risk Score
- 0.98
- Gender Split
- 64% female / 36% male
- Age Distribution
- <65: 32, 65-74: 200, 75-84: 135, 85+: 15
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Justin Treat, DO prescribes most
Top Medicare Part D drugs by claim count, 2023
- Azelastine Hcl
Azelastine Hcl
294 claims
- Ipratropium Bromide
Ipratropium Bromide
216 claims
- Montelukast Sodium 97
Montelukast Sodium
97 claims
- Alvesco 87
Alvesco
87 claims
- Wixela Inhub 82
Wixela Inhub
82 claims
- Fluticasone Propio… 58
Fluticasone Propionate
58 claims
- Albuterol Sulfate … 49
Albuterol Sulfate Hfa
49 claims
- Prednisone 36
Prednisone
36 claims
| Drug | Claims |
|---|---|
| Azelastine Hcl | 294 |
| Ipratropium Bromide | 216 |
| Montelukast Sodium | 97 |
| Alvesco Ciclesonide | 87 |
| Wixela Inhub Fluticasone Propion/Salmeterol | 82 |
| Fluticasone Propionate | 58 |
| Albuterol Sulfate Hfa Albuterol Sulfate | 49 |
| Prednisone | 36 |
| Spiriva Respimat Tiotropium Bromide | 34 |
| Epinephrine | 29 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Allergy & Immunology Physician Overview
How Justin Treat, DO fits within the Allergy & Immunology Physician landscape nationally.
3,390
Allergy & Immunology Physician Providers in US
52
States with Allergy & Immunology Physician
764
Avg Claims per Provider
Justin Treat, DO's 1,206 claims are above the specialty average of 764.
Nearby Allergy & Immunology Physician Providers in Oregon
Other clinicians with the same primary specialty enrolled in Oregon, drawn from the same CMS NPPES roster as Treat.
Dr. Clifford Anderson
MD
Portland, OR
Dr. Laurel Anderson Cowell
MD
Portland, OR
Dr. Karen Anstey
M.D.
Portland, OR
Dr. Kristyn Anthony
M.D.
Tualatin, OR
Dr. Jennifer Bane
PA-C
Portland, OR
Compare Allergy & Immunology Physician nationally: see state-by-state distribution →
Before you book an appointment
Use this federal record as your verification checklist, not as a recommendation.
- Confirm the NPI record is current in the official CMS registry, providers update their own NPPES details, and moves can lag. Verify this NPI
- Check the active license and any disciplinary history with the Oregon medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Allergy & Immunology Physician peer on Medicare volume and prescribing patterns. Compare providers
Medicare Part D and MIPS figures describe practice patterns in federal programs only, they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.
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Frequently Asked Questions
What is Justin Treat, DO's specialty? ▼
Justin Treat, DO specializes in Allergy & Immunology Physician and practices in Portland, Oregon. Credentials: DO.
How much does Justin Treat, DO prescribe under Medicare Part D? ▼
In 2023, Justin Treat, DO wrote 1,206 Medicare Part D claims totaling $921K in drug costs for 382 beneficiaries.
Where is Justin Treat, DO located? ▼
Justin Treat, DO is located at 3600 N INTERSTATE AVE, Portland, OR, 97227. Phone: (503) 612-3375.
What is Justin Treat, DO's NPI number? ▼
Justin Treat, DO's National Provider Identifier (NPI) is 1801826516, issued on 07/05/2006.
Does Justin Treat, DO prescribe more brand-name or generic drugs? ▼
Justin Treat, DO's prescribing is 25% brand-name and 75% generic drugs by claim count, with $871K in brand drug costs.
How many Allergy & Immunology Physician providers are there in the US? ▼
There are 3,390 Allergy & Immunology Physician providers across 52 states in the US. The average Allergy & Immunology Physician provider writes 764 Medicare Part D claims per year.
What drugs does Justin Treat, DO prescribe most often? ▼
Based on 2023 Medicare Part D data, Justin Treat, DO's most frequently prescribed drugs include Azelastine Hcl, Ipratropium Bromide, Montelukast Sodium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Justin Treat, DO accept Medicare? ▼
Justin Treat, DO appears in CMS Medicare data with 1,206 Part D claims and 382 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Justin Treat, DO's credentials? ▼
Justin Treat, DO's NPI is 1801826516 with credentials DO. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.
Data Sources
View source datasets and methodology notes
- Provider Directory
- CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
- Specialty Classification
- NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
- Prescribing Data
- CMS Medicare Part D Prescriber Public Use File (2023). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
- Limitations
- Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.
See our complete data methodology for details on how we collect and process government data.
Data as of April 2026 (NPPES) / 2023 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).
Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology
Compiled from official public sources by the PlainDoctor editorial team.