NPI registry status
Active
2026 NPPES data Allergy & Immunology Physician NPI 1619288347 D.O.
Verify on CMS → Duyen Nguyen, D.O.
Allergy & Immunology Physician in Houston, Texas.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 3,394 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
615
Medicare Part D claims · 150 beneficiaries · Allergy & Immunology Physician avg: 764
Generic prescribing
74%
generic claims · 26% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$1.7K
72 payments · CMS Open Payments (Sunshine Act)
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
Duyen Nguyen, D.O. filed 615 Medicare Part D claims in 2023 as a Allergy & Immunology Physician in Houston, Texas, prescribing 74% generic.
- 615
- Part D claims, 2023
- 74%
- 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.
Duyen Nguyen, D.O.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
615 Top 31% higher than 69% 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)
Duyen Nguyen, D.O. 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 Duyen Nguyen, D.O.?
Quality data not reportedPrimary specialty
Allergy & Immunology Physician
Medicare Part D claims
615 20% vs specialty avg
Specialty distribution in Texas
How Allergy & Immunology Physician compares to other specialties among Texas 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).
Duyen Nguyen, D.O. appears in the CMS NPPES registry as an Allergy & Immunology Physician provider holding D.O. credentials at 13114 FM 1960 ROAD WEST, Houston, TX, 77065, with a listed phone of (281) 970-7788. NPI 1619288347 was issued on 06/28/2010.
Medicare Part D records for calendar year 2023 show 615 prescription claims written by this provider, covering 150 Medicare beneficiaries and totaling roughly $103K in drug spend, split 26% brand-name and 74% generic by claim count.
Allergy & Immunology Physician is a narrow specialty nationwide, with 3,394 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 | 1619288347 |
|---|---|
| Specialty | Allergy & Immunology Physician |
| Credentials | D.O. |
| Gender | Female |
| NPI Issued | 06/28/2010 |
Hospital and facility affiliations
Facilities where Duyen Nguyen, D.O. 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.
Allergy And Ent Associates PLLC
Spring, TX
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
Industry payments received (2024) - CMS Open Payments transparency data
The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for Duyen Nguyen, D.O.. Source: openpaymentsdata.cms.gov.
Total received
$1.7K
Largest payer
AstraZeneca Pharmaceuticals LP
Most common payment type
Food and Beverage
Industry payments are not necessarily indicators of bias, they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.
License & disciplinary context - Texas TMB 2023 annual report
Aggregate state board data only, NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~77K Texas medical licensees in 2023 - they are NOT specific to Duyen Nguyen, D.O.. To verify Duyen Nguyen, D.O.'s current license status, search the TMB public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
344
Total board actions, Texas 2023
Across 334 cases
4.47
Actions per 1,000 licensees
Texas statewide rate
probation
Most common action type
94 cases
TMB publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the Texas disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Above average
Duyen Nguyen, D.O. - brand share 26.0%
Allergy & Immunology Physician average
26% brand-name claims vs 74% generic, on 615 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.
615
Total Claims
$103K
Total Drug Cost
150
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 942
- Total Day Supply
- 24,634
- Brand vs Generic
- 26% brand / 74% generic
- Brand Drug Cost
- $91K
- Generic Drug Cost
- $11K
- Antibiotic Claims
- 62
Patient Demographics
- Average Patient Age
- 72.5 years
- Avg HCC Risk Score
- 1.05
- Gender Split
- 65% female / 35% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Duyen Nguyen, D.O. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Montelukast Sodium
Montelukast Sodium
72 claims
- Fluticasone Propio…
Fluticasone Propionate
50 claims
- Hydroxyzine Hcl
Hydroxyzine Hcl
46 claims
- Azelastine Hcl
Azelastine Hcl
45 claims
- Trelegy Ellipta
Trelegy Ellipta
43 claims
- Albuterol Sulfate …
Albuterol Sulfate Hfa
38 claims
- Prednisone
Prednisone
35 claims
- Ipratropium Bromide
Ipratropium Bromide
31 claims
| Drug | Claims |
|---|---|
| Montelukast Sodium | 72 |
| Fluticasone Propionate | 50 |
| Hydroxyzine Hcl | 46 |
| Azelastine Hcl | 45 |
| Trelegy Ellipta Fluticasone/Umeclidin/Vilanter | 43 |
| Albuterol Sulfate Hfa Albuterol Sulfate | 38 |
| Prednisone | 35 |
| Ipratropium Bromide | 31 |
| Triamcinolone Acetonide | 26 |
| Amoxicillin-Clavulanate Potass Amoxicillin/Potassium Clav | 22 |
* 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 Duyen Nguyen, D.O. fits within the Allergy & Immunology Physician landscape nationally.
3,394
Allergy & Immunology Physician Providers in US
52
States with Allergy & Immunology Physician
764
Avg Claims per Provider
Duyen Nguyen, D.O.'s 615 claims are below the specialty average of 764.
Nearby Allergy & Immunology Physician Providers in Texas
Other clinicians with the same primary specialty enrolled in Texas, drawn from the same CMS NPPES roster as Nguyen.
Dr. Margaret Adair
M.D.
Coppell, TX
Dr. Fiona Adame
DO
Galveston, TX
Dr. Nedal Adi
M.D.
Webster, TX
Dr. Colleen Adkins
M.D.
Austin, TX
Dr. Tonia Afshan
MD, MPH
Austin, TX
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 Texas 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.
Healthcare Guides
Learn more about finding, verifying, and understanding healthcare providers.
How to Find a Doctor
Step-by-step guide to choosing a provider
Verify Credentials
Check NPI, board certification & license status
Medical Specialties Explained
Who treats what and how specialties differ
Understanding Medicare Claims Data
What prescribing data reveals about a provider
In-Network vs Out-of-Network
How insurance networks affect your costs
Telehealth Guide
Virtual care options and coverage in 2026
Explore Texas
Frequently Asked Questions
What is Duyen Nguyen, D.O.'s specialty? ▼
Duyen Nguyen, D.O. specializes in Allergy & Immunology Physician and practices in Houston, Texas. Credentials: D.O..
How much does Duyen Nguyen, D.O. prescribe under Medicare Part D? ▼
In 2023, Duyen Nguyen, D.O. wrote 615 Medicare Part D claims totaling $103K in drug costs for 150 beneficiaries.
Where is Duyen Nguyen, D.O. located? ▼
Duyen Nguyen, D.O. is located at 13114 FM 1960 ROAD WEST, Houston, TX, 77065. Phone: (281) 970-7788.
What is Duyen Nguyen, D.O.'s NPI number? ▼
Duyen Nguyen, D.O.'s National Provider Identifier (NPI) is 1619288347, issued on 06/28/2010.
Does Duyen Nguyen, D.O. prescribe more brand-name or generic drugs? ▼
Duyen Nguyen, D.O.'s prescribing is 26% brand-name and 74% generic drugs by claim count, with $91K in brand drug costs.
How many Allergy & Immunology Physician providers are there in the US? ▼
There are 3,394 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 Duyen Nguyen, D.O. prescribe most often? ▼
Based on 2023 Medicare Part D data, Duyen Nguyen, D.O.'s most frequently prescribed drugs include Montelukast Sodium, Fluticasone Propionate, Hydroxyzine Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Duyen Nguyen, D.O. accept Medicare? ▼
Duyen Nguyen, D.O. appears in CMS Medicare data with 615 Part D claims and 150 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Duyen Nguyen, D.O.'s credentials? ▼
Duyen Nguyen, D.O.'s NPI is 1619288347 with credentials D.O.. 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 2026.