Medicare Enrolled
Dr. Mary Nguyen, M.D.
Family Medicine · Castroville, TX
Practice pattern: Clinical Cardiology
— Primarily office-based clinical cardiology
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. Mary Nguyen is a family medicine specialist in Castroville, TX, with 20 years of NPI registration. Based on federal Medicare data, Dr. Nguyen performed 1,300 Medicare services in 2023. These records do not provide a deduplicated patient total.
Between the years covered by Open Payments, Dr. Nguyen received a total of $7,797 from 47 pharmaceutical and/or device companies across 474 payment records. A record can group multiple payments. These transfers are publicly reported through CMS Open Payments. Disclosure alone does not establish their effect on care. A reliable breakdown by payment category is not available in this snapshot. 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.
✓ 20 years of NPI registration
▲ Top 23% volume in TX
$7,797 industry payments
Medicare Practice Summary — 2023
Medicare Utilization ↗1,300
Medicare services
Top 23% in TX for family medicine
Not available
Unique patients (not deduplicated)
$52
Avg. Medicare payment
Medicare patients only (65+ / disabled) · How to read this →
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 (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. |
253 | $80 | $131 |
| 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. |
225 | $54 | $90 |
| 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. |
125 | $77 | $83 |
| Annual wellness visit, follow-up A follow-up annual wellness visit that includes a personalized prevention plan of service. |
115 | $109 | $113 |
| Annual alcohol misuse screening, 5 to 15 minutes | 114 | $15 | $15 |
| Annual depression screening | 108 | $10 | $10 |
| Chronic care management services Comprehensive assessment and care planning for patients requiring ongoing chronic care management. |
99 | $43 | $70 |
| Annual intensive behavioral therapy for cardiovascular disease, 15 minutes A yearly, in-person session focused on intensive behavioral therapy to help manage cardiovascular disease. The session lasts for 15 minutes and is conducted with the patient individually. |
82 | $25 | $64 |
| Assessment of emotional or behavioral problems An evaluation to identify and understand emotional or behavioral issues. This process involves reviewing symptoms and behaviors to determine the nature of the concerns. |
80 | $3 | $5 |
| Manual urinalysis with microscopic examination A urine test performed manually without automated equipment. The sample is examined under a microscope to check for abnormalities. |
25 | $4 | $4 |
| Psychological test evaluation, first hour A healthcare professional evaluates the results of psychological testing during an initial one-hour session. |
21 | $90 | $150 |
| Psychological test administration, first 30 minutes A technician administers psychological or neuropsychological testing for the first 30 minutes. |
21 | $25 | $45 |
| Urine microalbumin test (kidney screening) A laboratory test that measures the amount of microalbumin, a small protein, in a urine sample. This test is used to detect early signs of kidney damage. |
17 | $6 | $8 |
| New patient office visit (45-59 min) An initial office visit for a new patient lasting between 45 and 59 minutes. This code covers the total time spent by the physician or qualified healthcare professional on the date of the encounter. |
15 | $85 | $171 |
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. These counts do not measure clinical quality or years of experience.
Industry Payment Transparency
Open Payments through 2024 ↗$7,797
Total received (2018-2024)
Avg $1,114/year across 7 years
Top 7% in TX for family medicine
A higher payment rank reflects disclosed industry relationships (consulting, research, speaking) common among subspecialists — not wrongdoing.
47
Companies
474
Payment records
Payments are publicly reported; disclosure does not establish legality · Not evidence of wrongdoing · How to interpret →
Payment categories are unavailable while the source breakdown is being rebuilt. Company and year totals do not identify how much belongs to each category.
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
2024
$1,541
2023
$1,365
2022
$994
2021
$1,461
2020
$839
2019
$712
2018
$885
Payments by company (2024)
ABBVIE INC.
$259
Novo Nordisk Inc
$244
Axsome Therapeutics, Inc.
$142
Xeris Pharmaceuticals, Inc.
$106
IRONSHORE PHARMACEUTICALS INC.
$105
Lilly USA, LLC
$105
Bayer Healthcare Pharmaceuticals Inc.
$104
Astellas Pharma US Inc
$82
PFIZER INC.
$78
Otsuka America Pharmaceutical, Inc.
$76
AstraZeneca Pharmaceuticals LP
$55
ITI, Inc. (d/b/a Intra-Cellular Therapies, Inc.)
$52
Exact Sciences Corporation
$34
SI-BONE, INC.
$28
Abbott Laboratories
$25
Vanda Pharmaceuticals Inc.
$17
Agile Therapeutics, Inc.
$16
GlaxoSmithKline, LLC.
$15
Top 3 companies account for 41.8% of 2024 payments
All-time payments by company (2018-2024) ›
Novo Nordisk Inc
$1,173
ABBVIE INC.
$823
Lilly USA, LLC
$613
AstraZeneca Pharmaceuticals LP
$503
Biohaven Pharmaceuticals, Inc.
$432
AbbVie Inc.
$411
PFIZER INC.
$345
GlaxoSmithKline, LLC.
$287
Astellas Pharma US Inc
$277
SANOFI-AVENTIS U.S. LLC
$257
Bayer Healthcare Pharmaceuticals Inc.
$244
Merck Sharp & Dohme Corporation
$203
Allergan, Inc.
$189
Janssen Pharmaceuticals, Inc
$177
Allergan Inc.
$168
Axsome Therapeutics, Inc.
$163
Takeda Pharmaceuticals U.S.A., Inc.
$143
Bayer HealthCare Pharmaceuticals Inc.
$129
Merck Sharp & Dohme LLC
$123
Currax Pharmaceuticals LLC
$120
Xeris Pharmaceuticals, Inc.
$106
Amgen Inc.
$106
IRONSHORE PHARMACEUTICALS INC.
$105
Otsuka America Pharmaceutical, Inc.
$94
Exact Sciences Corporation
$52
ITI, Inc. (d/b/a Intra-Cellular Therapies, Inc.)
$52
ARBOR PHARMACEUTICALS, INC.
$47
Shire North American Group Inc
$46
Gilead Sciences, Inc.
$40
IDORSIA PHARMACEUTICALS US INC
$34
Genentech USA, Inc.
$34
SI-BONE, INC.
$28
Salix Pharmaceuticals, a division of Bausch Health US, LLC
$27
Nevro Corp.
$25
Abbott Laboratories
$25
Ironshore Pharmaceuticals Inc.
$22
Biohaven Pharmaceutical Holding Company Ltd.
$20
Eisai Inc.
$18
Sanofi Pasteur Inc.
$18
Vanda Pharmaceuticals Inc.
$17
Teva Pharmaceuticals USA, Inc.
$17
Agile Therapeutics, Inc.
$16
Esperion Therapeutics, Inc.
$16
Novartis Pharmaceuticals Corporation
$15
Amarin Pharma Inc.
$14
Philips Electronics North America Corporation
$13
Synergy Pharmaceuticals Inc
$11
Top 3 companies account for 33.5% of all-time payments
Associated products mentioned in payments ›
(8874) inCourage · AIRSUPRA · AJOVY · AREXVY · Amitiza · Auvelity · BEXSERO · BREZTRI · BYDUREON · CAPLYTA · CHANTIX · CONTRAVE · CREON · Cologuard Collection Kit · Dayvigo · ELIQUIS · EMGALITY · Edarbi · FARXIGA · FREESTYLE LIBRE 3 · GARDASIL 9 · GVOKE HYPOPEN · HETLIOZ · INVOKANA · JANUVIA · JARDIANCE · JORNAY PM · Kerendia · LEQVIO · LINZESS · LYRICA · MOUNJARO · MYDAYIS · MYRBETRIQ · NEXLETOL · NURTEC ODT · ONZETRA XSAIL · Omnia · Otovel · Ozempic · PAXLOVID · PENTACEL · PNEUMOVAX 23 · PREMARIN · PREVNAR - 13 · PREVNAR 13 · PREVNAR 20 · PROQUAD · Prolia · QULIPTA · QUVIVIQ · REXULTI · ROTATEQ · RYBELSUS · Rybelsus · SHINGRIX · SOLIQUA · SOLIQUA 100/33 · SYMBICORT · TOUJEO · TRELEGY ELLIPTA · TRINTELLIX · TRULICITY · Trintellix · Trulance · Twirla · UBRELVY · VAXELIS · VIIBRYD · VRAYLAR · VYVANSE · Vascepa · Veozah · Victoza · Wegovy · XARELTO · XIFAXAN · Xofluza
Should you be concerned? Industry payments are disclosed through CMS Open Payments. Disclosure alone does not establish their purpose, legality, or effect on care. 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 →
Geographic Context
Family medicine physicians in nearby ZIP areas
539
County median income
$73,462
Nearest hospital to ZIP centroid (approximate)
WESTOVER HILLS BAPTIST HOSPITAL
14.4 mi
14.4 mi
Data Sources
| Provider Registry | ✓ NPPES | NPPES snapshot; verify current record |
| Medicare Enrollment | ✓ PECOS | PECOS snapshot |
| Practice Data | ✓ Medicare Util. | Annual (CY lag) |
| Industry Payments | ✓ Open Payments | CY 2024 |
| Disciplinary History | — Not included | 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 23% in TX), with 20 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 (30-39 min)?
Based on Medicare claims data, Dr. Nguyen performed 253 office visit, established patient (30-39 min) services. These records cover Medicare fee-for-service activity, including eligible younger beneficiaries; they do not measure total practice volume or clinical quality.
Does Dr. Nguyen receive payments from pharmaceutical companies?
Yes. Dr. Nguyen received a total of $7,797 from 47 companies across 474 payment records. A record can group multiple payments. These transfers are publicly disclosed through CMS Open Payments. Disclosure alone does not establish their legality or effect on care. 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 family medicine physicians in Castroville?
Dr. Nguyen's average Medicare payment per service is $52. 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 the presence of registry, enrollment, activity or payment records, not verified experience or clinical quality. 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?
Source publication dates and the snapshots loaded on this site can differ. Rebuilding a page does not refresh its source records. Check the Medicare reporting year and the payment interval shown above; consult the linked official sources for newer releases and current registry details. See our data freshness policy →
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About this page
This page combines public CMS records with calculated summaries and explanatory procedure labels. These transformations are not verbatim federal records. Sources: 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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