Medicare Enrolled
Dr. Thai Nguyen, M.D.
Internal Medicine · Westminster, CA
Practice pattern: Clinical Cardiology
— Primarily office-based clinical cardiology
Low-engagement
Very High
DATA COVERAGE
Data in 4 of 4 federal sources
Measures public federal data availability — not provider quality
Informational, not a quality rating.
This page presents federal public records about Dr. Nguyen from CMS (NPPES, Open Payments, Medicare Provider Utilization, PECOS). It is not medical advice, an endorsement, or a judgment of clinical quality. Always consult the provider directly and a licensed clinician for medical decisions. Read methodology →
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What this data tells you about Dr. Nguyen
Dr. Thai Nguyen is an internal medicine specialist in Westminster, CA, with 19 years of NPI registration. Based on federal Medicare data, Dr. Nguyen performed 3,073 Medicare services across 1,587 unique beneficiaries.
Between the years covered by Open Payments, Dr. Nguyen received a total of $9,713 from 47 pharmaceutical and/or device companies across 318 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in internal medicine. Most payments are for meals and travel — low-value interactions common across virtually all practicing physicians. Patients may wish to discuss these relationships with their provider.
The Data Coverage level for Dr. Nguyen is Very High — reflecting how much public federal data is available about this provider. Patients are encouraged to use this data as one of several factors when choosing a healthcare provider.
✓ 19 years in practice
▲ Top 10% volume in CA
$9,713 industry payments
Medicare Practice Summary
Medicare Utilization ↗3,073
Medicare services
Top 10% in CA for internal medicine
1,587
Unique beneficiaries
$64
Avg. Medicare payment
Medicare patients only (65+ / disabled) · How to read this →
~162 Medicare services per year of practice
Top procedures by volume
Ranked by number of services performed for Medicare patients. Avg. submitted charge is what the provider billed; avg. Medicare payment is what CMS paid.
| Procedure | Volume | Avg. paid | Avg. submitted |
|---|---|---|---|
| Office visit, established patient (20-29 min) An office visit for an existing patient lasting between 20 and 29 minutes. The visit involves medical evaluation and management of the patient's condition. |
731 | $68 | $150 |
| Blood draw (venipuncture) Insertion of a needle into a vein to collect a blood sample. |
611 | $8 | $40 |
| Chronic care management, first 20 min/month This service covers the first 20 minutes of clinical staff time directed by a healthcare professional each calendar month to manage chronic conditions. |
591 | $49 | $100 |
| Office visit, established patient (30-39 min) A follow-up office visit for an existing patient lasting between 30 and 39 minutes. The visit involves medical evaluation and management of the patient's condition. |
483 | $97 | $250 |
| Annual wellness visit, follow-up A follow-up annual wellness visit that includes a personalized prevention plan of service. |
186 | $140 | $235 |
| Flu vaccine administration This procedure involves the administration of the influenza virus vaccine. It covers the process of delivering the vaccine to the patient. |
103 | $33 | $40 |
| Quadrivalent influenza vaccine, cell-culture derived A flu shot containing four strains of influenza virus, produced using cell culture technology rather than eggs. This formulation is free from preservatives and antibiotics. |
88 | $33 | $50 |
| Pneumococcal conjugate vaccine (PCV20) An intramuscular injection of the 20-valent pneumococcal conjugate vaccine. It is used to protect against diseases caused by Streptococcus pneumoniae bacteria. |
44 | $282 | $369 |
| Pneumonia vaccine administration This procedure involves the injection of a vaccine to protect against pneumococcal disease. It is administered by a healthcare provider. |
44 | $33 | $40 |
| Advance care planning consultation, first 30 min A session focused on discussing and documenting future healthcare preferences and goals. This service covers the initial 30 minutes of the planning discussion. |
43 | $85 | $100 |
| Annual wellness visit, initial visit A yearly appointment to review your health and create a personalized prevention plan. This initial visit focuses on preventive care and health assessment. |
36 | $178 | $249 |
| Initial preventive physical examination, new Medicare beneficiary A comprehensive preventive health visit for new Medicare beneficiaries during their first 12 months of enrollment. The service is conducted as a face-to-face visit and is limited to preventive care. |
24 | $179 | $250 |
| Transitional care management services, moderate complexity Services provided to coordinate care during the transition from an inpatient or other facility setting back to the community. This includes follow-up and management of a health problem of at least moderate complexity. |
22 | $173 | $250 |
| New patient office visit (30-44 min) An initial office visit for a new patient lasting between 30 and 44 minutes. This code is used when the total time spent on the date of the encounter falls within this range. |
20 | $88 | $250 |
| Electrocardiogram (EKG), 12-lead A standard heart rhythm test using at least 12 leads to record electrical activity. A healthcare provider interprets the results and provides a written report. |
17 | $13 | $85 |
| Office visit, established patient (10-19 min) An office visit for an existing patient lasting 10 to 19 minutes. The visit involves medical evaluation and management of the patient's condition. |
16 | $39 | $120 |
| Quadrivalent influenza vaccine, preservative-free A flu shot containing four strains of the influenza virus, formulated without preservatives, administered in a 0.5 ml dose. |
14 | $22 | $50 |
How to read this data: This reflects Medicare patients only (typically 65+). Payment amounts are what Medicare paid the provider, not your out-of-pocket cost. A higher procedure volume generally indicates more experience with that procedure.
Industry Payment Transparency
Open Payments through 2024 ↗$9,713
Total received (2018-2024)
Avg $1,388/year across 7 years
Top 10% in CA for internal medicine
A higher payment rank reflects disclosed industry relationships (consulting, research, speaking) common among subspecialists — not wrongdoing.
47
Companies
318
Individual payments
All payments are legal and publicly reported · Not evidence of wrongdoing · How to interpret →
Payment profile
Industry payments classified by relationship type. Not all payments are equal — research and consulting reflect different relationships than speaking programs or meals.
Meals & Travel
Food, beverages, travel, and lodging — typically low-value
$9,699 (99.9%)
Speaking / Promotional
Speaker programs, honoraria, and industry-sponsored educational events
$14 (0.1%)
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
2024
$1,052
2023
$1,561
2022
$1,832
2021
$883
2020
$906
2019
$1,651
2018
$1,826
Payments by company (2024)
Consulting
Speaking
Meals & Travel
Research
Amgen Inc.
$220
Phathom Pharmaceuticals, Inc.
$149
Boehringer Ingelheim Pharmaceuticals, Inc.
$113
Sumitomo Pharma America, Inc.
$72
AIMMUNE THERAPEUTICS, INC.
$66
Lilly USA, LLC
$64
AstraZeneca Pharmaceuticals LP
$51
Exact Sciences Corporation
$43
IRONWOOD PHARMACEUTICALS, INC
$43
Bayer Healthcare Pharmaceuticals Inc.
$38
Novartis Pharmaceuticals Corporation
$38
ABBVIE INC.
$37
GENZYME CORPORATION
$32
Astellas Pharma US Inc
$25
Gilead Sciences, Inc.
$25
Lundbeck LLC
$21
Esperion Therapeutics, Inc.
$18
Top 3 companies account for 45.8% of 2024 payments
All-time payments by company (2018-2024) ›
Amgen Inc.
$1,845
Boehringer Ingelheim Pharmaceuticals, Inc.
$1,104
AstraZeneca Pharmaceuticals LP
$1,004
Salix Pharmaceuticals, a division of Bausch Health US, LLC
$656
AbbVie, Inc.
$489
ABBVIE INC.
$421
Gilead Sciences, Inc.
$364
PFIZER INC.
$341
Janssen Pharmaceuticals, Inc
$333
Lilly USA, LLC
$288
Novo Nordisk Inc
$279
AbbVie Inc.
$235
GlaxoSmithKline, LLC.
$231
Novartis Pharmaceuticals Corporation
$211
Ironwood Pharmaceuticals, Inc
$156
Phathom Pharmaceuticals, Inc.
$149
Astellas Pharma US Inc
$145
Bayer Healthcare Pharmaceuticals Inc.
$139
Allergan Inc.
$135
Celgene Corporation
$133
Amarin Pharma Inc.
$113
SANOFI-AVENTIS U.S. LLC
$105
Exact Sciences Corporation
$100
Sumitomo Pharma America, Inc.
$90
AIMMUNE THERAPEUTICS, INC.
$66
Abbott Laboratories
$55
Merck Sharp & Dohme LLC
$50
Nestle HealthCare Nutrition Inc.
$47
IRONWOOD PHARMACEUTICALS, INC
$43
Allergan, Inc.
$38
TherapeuticsMD, Inc.
$35
RedHill Biopharma Inc.
$33
GENZYME CORPORATION
$32
SUN PHARMACEUTICAL INDUSTRIES INC.
$22
Xeris Pharmaceuticals, Inc.
$21
Adamas Pharmaceuticals, Inc.
$21
E.R. Squibb & Sons, L.L.C.
$21
Lundbeck LLC
$21
Hikma Pharmaceuticals USA
$20
Mannkind Corporation
$19
NESTLE HEALTHCARE NUTRITION INC.
$18
Esperion Therapeutics, Inc.
$18
Genentech USA, Inc.
$18
Merck Sharp & Dohme Corporation
$14
Boston Scientific Corporation
$13
Horizon Therapeutics plc
$12
Seqirus USA Inc
$12
Top 3 companies account for 40.7% of all-time payments
Associated products mentioned in payments ›
AFREZZA · AIRSUPRA · Aimovig · Allure Quadra RF CRT Pacemaker · BREZTRI · BREZTRI AEROSPHERE · BRILINTA · BYDUREON · CHANTIX · CREON · CardioMEMS HF System · Cologuard Collection Kit · Creon · DUPIXENT · DUZALLO · ELIQUIS · EMGALITY · ENTRESTO · EUCRISA · EVENITY · Enbrel · FARXIGA · Fluad · GARDASIL 9 · GEMTESA · GOCOVRI · GVOKE HYPOPEN · IMVEXXY · JANUVIA · JARDIANCE · KAPSPARGO · KRYSTEXXA · Kerendia · LEQVIO · LINZESS · Linzess · MOUNJARO · MYRBETRIQ · Mavyret · Mitigare · NEXLETOL · NURTEC ODT · Otezla · Ozempic · PREMARIN · Prolia · QULIPTA · REXULTI · Repatha · SHINGRIX · SOLIQUA 100/33 · SYNERGY · TALTZ · TOUJEO · TRADJENTA · TRELEGY ELLIPTA · TRULICITY · Talicia · UBRELVY · VIBERZI · VOQUEZNA · VOWST · VRAYLAR · Vascepa · Vemlidy · Veozah · Victoza · XARELTO · XIFAXAN · Xofluza · ZENPEP
Should you be concerned? Payments from pharmaceutical and device companies are legal and common — 57% of U.S. physicians receive at least one. They often reflect legitimate consulting, research, or education. What matters is whether a recommended drug or device appears in your doctor's payment records. If so, consider asking your doctor about it. How to interpret this data →
Most payments (100%) are for meals and travel — low-value interactions that are common across virtually all practicing physicians. Total industry engagement is in the top 10% for internal medicine in CA.
Geographic Context
Internal medicine physicians within 10 mi
3,276
Per 100K population
103.5
County median income
$113,702
Nearest hospital
HUNTINGTON BEACH HOSPITAL
2.2 mi
2.2 mi
Data Sources
| Provider Registry | ✓ NPPES | Weekly updates |
| Medicare Enrollment | ✓ PECOS | Monthly updates |
| Practice Data | ✓ Medicare Util. | Annual (CY lag) |
| Industry Payments | ✓ Open Payments | CY 2024 |
| Disciplinary History | — Not public | N/A |
This provider has data in 4 of 4 available federal datasets, with a Data Coverage level of Very High. This reflects how much public data is available about a provider. How we calculate this →
Summary
Dr. Nguyen is a clinical cardiology specialist, with above-average Medicare volume (top 10% in CA), with low-engagement industry engagement in the top 10% of CA peers, with 19 years of NPI registration.
This summary is auto-generated from federal data, describing data availability and patterns. Read our methodology →
Frequently Asked Questions
Is Dr. Nguyen experienced with office visit, established patient (20-29 min)?
Based on Medicare claims data, Dr. Nguyen performed 731 office visit, established patient (20-29 min) services. Research suggests that higher procedure volume is often associated with better outcomes, particularly for complex procedures. Note that Medicare data only captures patients aged 65 and older, so the total practice volume across all patients is likely higher.
Does Dr. Nguyen receive payments from pharmaceutical companies?
Yes. Dr. Nguyen received a total of $9,713 from 47 companies across 318 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common among physicians — 57% of all U.S. physicians receive at least one industry payment. Patients may wish to ask their doctor about these relationships, especially if a recommended drug or device appears in the payment records.
How do Dr. Nguyen's costs compare to other internal medicine physicians in Westminster?
Dr. Nguyen's average Medicare payment per service is $64. Note that these figures represent what Medicare pays, not your out-of-pocket cost, which depends on your specific insurance plan and deductible. Procedure-level data above shows both what was submitted and what Medicare paid for each service type.
What does Data Coverage mean?
Data Coverage (currently Very High for Dr. Nguyen) measures how much public federal data is available about a provider. It is not a quality rating. A "Very High" or "High" level means the provider has data across multiple federal sources (NPPES, PECOS, Medicare Utilization, Open Payments), indicating a long track record of practice, Medicare participation, and industry disclosure. A "Low" or "Moderate" level may simply mean the provider is newer, does not see Medicare patients, or has not received any industry payments — none of which are inherently negative. Read our full methodology →
Is this data up to date?
Each data source has its own update cycle. Provider registry data (NPPES) is updated weekly. Medicare enrollment (PECOS) is updated monthly. Medicare practice data has a ~2 year lag — the most recent available is typically 2 years prior. Industry payment data (Open Payments) is published annually, usually in June, covering the prior calendar year. We display the data date prominently on each section so you always know how current it is. See our data freshness policy →
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About this page
All data on this page is sourced verbatim from public federal records published by the U.S. Centers for Medicare & Medicaid Services (CMS): NPPES ↗, Open Payments ↗, Medicare Provider Utilization ↗, and PECOS. Publication is mandated by the Physician Payments Sunshine Act (§6002 ACA, 42 U.S.C. §1320a-7h) and the Freedom of Information Act.
This page is not medical advice, an endorsement, a recommendation, or a quality rating. Data Coverage reflects data completeness — how much federal information exists for this provider — not clinical performance, patient outcomes, or quality of care. Always verify information directly with the provider and consult a licensed clinician before making medical decisions.
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