NPI registry status
Active
2026 NPPES data Pediatrics Physician NPI 1811077787 M.D.
Verify on CMS → Thuy Nguyen, M.D.
Pediatrics Physician in Westminster, California.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 80,576 in Pediatrics 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
4K
Medicare Part D claims · 147 beneficiaries · Pediatrics Physician avg: 762
Generic prescribing
84%
generic claims · 16% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$16.48
1 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Thuy Nguyen, M.D. filed 3,505 Medicare Part D claims in 2023 as a Pediatrics Physician in Westminster, California, prescribing 84% generic.
- 4K
- Part D claims, 2023
- 84%
- generic prescribing
- $16.48
- industry payments (Sunshine Act)
- ≥90th
- pct by Part D claim volume (lower-bound band)
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.
CMS NPPES provider registry desk
NPI 1811077787 · Pediatrics Physician
NPI-10 · ENUM-LEGACY · TAX-MEGA · RX-MID · BOOK-MID · PHOTO-ENUM
- NPI-10 1811077787
- ENUM-LEGACY 2006
- TAX-MEGA 81K Pediatrics Physician
- RX-MID 3,505
- BOOK-MID 9,954 in California
- PHOTO-ENUM John Buck · 2006
Thuy Nguyen, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
3,505 ≥ 90th percentile 90% of 1,370,886 prescribers are in lower value bands
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.
The percentile is a conservative 100-claim band: it counts only prescribers in lower claim-volume bands. Medicare Part D claim volume is activity context, not a quality measure or recommendation. See methodology § corpus placement.
Source CMS Medicare Part D Prescriber Public Use File · 2023
◑
Board-eligible specialty (heuristic, not verified)
Thuy Nguyen, M.D. practices in an ABMS-board-eligible specialty but we don't have enough CMS-participation signals to confirm active board-certified status. Consult CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Thuy Nguyen, M.D.?
Quality data not reportedPrimary specialty
Pediatrics Physician
Medicare Part D claims
3,505 360% vs specialty avg
Specialty distribution in California
How Pediatrics Physician compares to other specialties among California 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 Pediatrics 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).
Practice Address
Provider Details
| NPI | 1811077787 |
|---|---|
| Specialty | Pediatrics Physician |
| Credentials | M.D. |
| Gender | Female |
| NPI Issued | 10/16/2006 |
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 Thuy Nguyen, M.D.. Source: openpaymentsdata.cms.gov.
Total received
$16
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 - California MBC 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 ~150K California medical licensees in 2023 - they are NOT specific to Thuy Nguyen, M.D.. To verify Thuy Nguyen, M.D.'s current license status, search the MBC public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
576
Total board actions, California 2023
Across 556 cases
3.84
Actions per 1,000 licensees
California statewide rate
probation
Most common action type
186 cases
MBC 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 California disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Typical
Thuy Nguyen, M.D. - brand share 16.0%
Pediatrics Physician average
16% brand-name claims vs 84% generic, on 3,505 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.
3,505
Total Claims
$393K
Total Drug Cost
147
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 6,523
- Total Day Supply
- 190,393
- Brand vs Generic
- 16% brand / 84% generic
- Brand Drug Cost
- $291K
- Generic Drug Cost
- $101K
- Antibiotic Claims
- 32
Patient Demographics
- Average Patient Age
- 71.6 years
- Avg HCC Risk Score
- 0.86
- Gender Split
- 66% female / 34% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Thuy Nguyen, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Atorvastatin Calcium
Atorvastatin Calcium
401 claims
- Amlodipine Besylate
Amlodipine Besylate
186 claims
- Losartan Potassium
Losartan Potassium
185 claims
- Felodipine Er
Felodipine Er
161 claims
- Farxiga 113
Farxiga
113 claims
- Ezetimibe 105
Ezetimibe
105 claims
- Losartan-Hydrochlo… 100
Losartan-Hydrochlorothiazide
100 claims
- Vascepa 90
Vascepa
90 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 401 |
| Amlodipine Besylate | 186 |
| Losartan Potassium | 185 |
| Felodipine Er Felodipine | 161 |
| Farxiga Dapagliflozin Propanediol | 113 |
| Ezetimibe | 105 |
| Losartan-Hydrochlorothiazide Losartan/Hydrochlorothiazide | 100 |
| Vascepa Icosapent Ethyl | 90 |
| Levocetirizine Dihydrochloride | 88 |
| Alendronate Sodium | 76 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Pediatrics Physician Overview
How Thuy Nguyen, M.D. fits within the Pediatrics Physician landscape nationally.
80,576
Pediatrics Physician Providers in US
56
States with Pediatrics Physician
762
Avg Claims per Provider
Thuy Nguyen, M.D.'s 3,505 claims are above the specialty average of 762.
Nationwide Pediatrics Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Nguyen, both outside California so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2006)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Pediatrics Physician Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Nguyen.
One of 9,954 Pediatrics Physician providers enrolled in California, 5 are shown here.
Dr. Subha Aahlad
M.D.
Foster City, CA
Dr. Rebecca Aaronson
MD
Panorama City, CA
Dr. Gregorio Abad-Santos
M.D.
Long Beach, CA
Dr. Michelle Abajian
MD
La Canada, CA
Dr. Joseph Abapo
MD
Riverside, CA
Compare Pediatrics Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Thuy Nguyen, M.D.'s specialty? ▼
Thuy Nguyen, M.D. specializes in Pediatrics Physician and practices in Westminster, California. Credentials: M.D..
How much does Thuy Nguyen, M.D. prescribe under Medicare Part D? ▼
In 2023, Thuy Nguyen, M.D. wrote 3,505 Medicare Part D claims totaling $393K in drug costs for 147 beneficiaries.
Where is Thuy Nguyen, M.D. located? ▼
Thuy Nguyen, M.D. is located at 9550 BOLSA AVE. SUITE 101, Westminster, CA, 92683. Phone: (714) 775-1628.
What is Thuy Nguyen, M.D.'s NPI number? ▼
Thuy Nguyen, M.D.'s National Provider Identifier (NPI) is 1811077787, issued on 10/16/2006.
Does Thuy Nguyen, M.D. prescribe more brand-name or generic drugs? ▼
Thuy Nguyen, M.D.'s prescribing is 16% brand-name and 84% generic drugs by claim count, with $291K in brand drug costs.
How many Pediatrics Physician providers are there in the US? ▼
There are 80,576 Pediatrics Physician providers across 56 states in the US. The average Pediatrics Physician provider writes 762 Medicare Part D claims per year.
What drugs does Thuy Nguyen, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Thuy Nguyen, M.D.'s most frequently prescribed drugs include Atorvastatin Calcium, Amlodipine Besylate, Losartan Potassium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Thuy Nguyen, M.D. accept Medicare? ▼
Thuy Nguyen, M.D. appears in CMS Medicare data with 3,505 Part D claims and 147 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Thuy Nguyen, M.D.'s credentials? ▼
Thuy Nguyen, M.D.'s NPI is 1811077787 with credentials M.D.. 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
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.