Medicare Enrolled
Dr. Tam Nguyen, D.O.
Hospitalist Physician · San Jose, 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 →
Are you Dr. Nguyen?
Request a correction or review of any data shown here. Provider portal →
What this data tells you about Dr. Nguyen
Dr. Tam Nguyen is a hospitalist physician in San Jose, CA, with 19 years of NPI registration. Based on federal Medicare data, Dr. Nguyen performed 4,173 Medicare services across 1,528 unique beneficiaries.
Between the years covered by Open Payments, Dr. Nguyen received a total of $5,793 from 38 pharmaceutical and/or device companies across 261 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in hospitalist physician. 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 3% volume in CA
$5,793 industry payments
Medicare Practice Summary
Medicare Utilization ↗4,173
Medicare services
Top 3% in CA for hospitalist physician
1,528
Unique beneficiaries
$99
Avg. Medicare payment
Medicare patients only (65+ / disabled) · How to read this →
~220 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 (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. |
3,112 | $103 | $165 |
| Home visit, established patient, moderate complexity A home visit for an established patient involving moderate medical decision making. The visit requires at least 40 minutes of time if time is used to determine the level of service. |
203 | $104 | $193 |
| 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. |
142 | $118 | $250 |
| 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. |
116 | $76 | $110 |
| 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. |
105 | $57 | $114 |
| Remote patient monitoring management, 20 min/month Management based on results from remote vital sign monitoring for the first 20 minutes per calendar month. |
90 | $45 | $93 |
| Home health plan of care certification Certification by a physician or allowed practitioner for Medicare-covered home health services under a home health plan of care. This includes contacting the home health agency and reviewing reports of patient status required by physicians. |
72 | $47 | $150 |
| Nursing facility visit, moderate complexity A follow-up visit by a healthcare provider at a nursing facility for an established patient. The visit involves moderate medical decision making and takes at least 30 minutes. |
63 | $76 | $135 |
| Remote patient monitoring device, 30 days Initial setup of devices for remote monitoring of body functions with daily data transmission or alerts. This service covers the first 30 days of the monitoring period. |
50 | $55 | $115 |
| Home health plan of care re-certification A physician reviews the patient's status and contacts the home health agency to re-certify the plan of care without the patient being present. |
45 | $38 | $75 |
| Ultrasound of head and neck blood flow, bilateral An ultrasound exam that uses sound waves to visualize and assess blood flow in the vessels of both the head and the neck. |
39 | $191 | $360 |
| Echocardiogram, transthoracic An ultrasound of the heart that uses color to show blood flow, rate, direction, and valve function. |
38 | $170 | $435 |
| Complete ultrasound of abdomen A diagnostic imaging test that uses sound waves to create detailed pictures of the organs and structures within the abdomen. |
37 | $123 | $261 |
| Nursing facility visit, low complexity A daily follow-up visit for an existing patient in a nursing facility involving straightforward medical decision making. The visit requires at least 15 minutes of time if time is used to determine the level of care. |
22 | $49 | $102 |
| Initial nursing facility care, moderate complexity Initial care provided to a patient in a nursing facility with moderate medical decision making, taking at least 35 minutes. |
14 | $108 | $183 |
| Remote physiologic monitoring setup and education Initial setup of remote monitoring equipment and patient education on its use. |
13 | $14 | $120 |
| Sleep study with heart rate and breathing monitoring A sleep study that monitors heart rate, breathing patterns, and sleep duration. This test records physiological data while you sleep to assess your sleep quality and breathing function. |
12 | $153 | $330 |
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.
0.9% high complexity
1.8% medium
97.3% routine
Industry Payment Transparency
Open Payments through 2024 ↗$5,793
Total received (2018-2024)
Avg $828/year across 7 years
Top 4% in CA for hospitalist physician
A higher payment rank reflects disclosed industry relationships (consulting, research, speaking) common among subspecialists — not wrongdoing.
38
Companies
261
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
$5,504 (95.0%)
Speaking / Promotional
Speaker programs, honoraria, and industry-sponsored educational events
$289 (5.0%)
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
2024
$1,041
2023
$1,558
2022
$1,467
2021
$1,095
2020
$370
2019
$80
2018
$182
Payments by company (2024)
Consulting
Speaking
Meals & Travel
Research
GlaxoSmithKline, LLC.
$259
ABBVIE INC.
$239
AstraZeneca Pharmaceuticals LP
$153
IRONWOOD PHARMACEUTICALS, INC
$72
PFIZER INC.
$71
SCILEX PHARMACEUTICALS INC.
$62
Lilly USA, LLC
$56
VIVUS LLC
$45
Sumitomo Pharma America, Inc.
$24
ABIOMED
$23
Salix Pharmaceuticals, a division of Bausch Health US, LLC
$19
Boston Scientific Corporation
$18
Top 3 companies account for 62.6% of 2024 payments
All-time payments by company (2018-2024) ›
GlaxoSmithKline, LLC.
$1,435
Nestle HealthCare Nutrition Inc.
$654
AstraZeneca Pharmaceuticals LP
$420
Novo Nordisk Inc
$399
ABBVIE INC.
$392
Scilex Pharmaceuticals Inc.
$321
Allergan, Inc.
$289
Boehringer Ingelheim Pharmaceuticals, Inc.
$180
Salix Pharmaceuticals, a division of Bausch Health US, LLC
$132
Avanir Pharmaceuticals, Inc.
$125
Abbott Laboratories
$112
PFIZER INC.
$105
Teva Pharmaceuticals USA, Inc.
$96
Novartis Pharmaceuticals Corporation
$88
Lilly USA, LLC
$76
Biohaven Pharmaceutical Holding Company Ltd.
$75
IRONWOOD PHARMACEUTICALS, INC
$72
Sunovion Pharmaceuticals Inc.
$66
Amarin Pharma Inc.
$66
VIVUS LLC
$65
AbbVie Inc.
$63
SCILEX PHARMACEUTICALS INC.
$62
Ironwood Pharmaceuticals, Inc
$52
Bayer HealthCare Pharmaceuticals Inc.
$51
Sumitomo Pharma America, Inc.
$46
Allergan Inc.
$45
Optinose US, Inc.
$42
ITI, Inc.
$40
Oyster Point Pharma, Inc.
$31
Kyowa Kirin, Inc.
$30
RedHill Biopharma Inc.
$26
MorphoSys, US Inc.
$23
ABIOMED
$23
E.R. Squibb & Sons, L.L.C.
$21
Edwards Lifesciences Corporation
$21
ACADIA Pharmaceuticals Inc
$19
Boston Scientific Corporation
$18
Sobi, Inc
$13
Top 3 companies account for 43.3% of all-time payments
Associated products mentioned in payments ›
AIRSUPRA · AREXVY · AUSTEDO · Assurity Pacemaker · Austedo XR · BOTOX COSMETIC · BREZTRI · BREZTRI AEROSPHERE · CAPLYTA · CREON · EDWARDS SAPIEN 3 TRANSCATHETER HEART VALVE (THV) · ELIQUIS · ELYXYB - CELECOXIB · ENTRESTO · FARXIGA · FASENRA · FREESTYLE LIBRE 2 · FREESTYLE LIBRE 3 · FreeStyle Libre 2 · GEMTESA · Impella · JARDIANCE · Kerendia · Kineret · LINZESS · LOKELMA · LONHALA MAGNAIR · Linzess · MONJUVI · MOUNJARO · NUEDEXTA · NUPLAZID · NURTEC ODT · Ozempic · PANCREAZE · PAXLOVID · QULIPTA · RYBELSUS · Rybelsus · SPIRIVA RESPIMAT · STIOLTO RESPIMAT · TRADJENTA · TRELEGY ELLIPTA · TYRVAYA · Talicia · UBRELVY · VIBERZI · VRAYLAR · Vascepa · WaveWriter Alpha Prime 16 · Wegovy · XIFAXAN · XIIDRA · Xhance · ZENPEP · ZTLido
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 (95%) are for meals and travel — low-value interactions that are common across virtually all practicing physicians. Total industry engagement is in the top 4% for hospitalist physician in CA.
Geographic Context
Hospitalist physicians within 10 mi
192
Per 100K population
10.1
County median income
$159,674
Nearest hospital
REGIONAL MEDICAL CENTER OF SAN JOSE
0.0 mi
0.0 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 3% in CA), with low-engagement industry engagement in the top 4% 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 (30-39 min)?
Based on Medicare claims data, Dr. Nguyen performed 3,112 office visit, established patient (30-39 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 $5,793 from 38 companies across 261 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 hospitalist physicians in San Jose?
Dr. Nguyen's average Medicare payment per service is $99. 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 →
Explore related providers
Same specialty & city
Hospitalist Physicians in San Jose
Browse hospitalist physicians in San Jose ranked by procedure volume and transparency data.
Highest volume
Top Hospitalist Physicians in CA
Hospitalist physicians ranked by total Medicare services performed statewide.
Industry payments
Pharma Payments to Hospitalist Physicians in CA
Which CA hospitalist physicians receive the most from drug and device companies.
By company
GlaxoSmithKline, LLC. Payments to Doctors
See all physicians who received payments from GlaxoSmithKline, LLC.
By company
Nestle HealthCare Nutrition Inc. Payments to Doctors
See all physicians who received payments from Nestle HealthCare Nutrition Inc.
By company
AstraZeneca Pharmaceuticals LP Payments to Doctors
See all physicians who received payments from AstraZeneca Pharmaceuticals LP.
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.
Provider corrections: Provider portal · Privacy questions: Privacy Policy · Terms: Terms of Use · Methodology: Methodology