Medicare Enrolled
Dr. Christopher Nguyen, M.D.
Internal Medicine · Shenandoah, TX
Practice pattern: Cardiac & Electrophysiology
— Practice combining cardiac and electrophysiology services
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. Christopher Nguyen is an internal medicine specialist in Shenandoah, TX, with 19 years of NPI registration. Based on federal Medicare data, Dr. Nguyen performed 8,333 Medicare services across 4,993 unique beneficiaries.
Between the years covered by Open Payments, Dr. Nguyen received a total of $10,675 from 27 pharmaceutical and/or device companies across 267 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. This is not a quality rating. Patients are encouraged to use this data as one of several factors when choosing a healthcare provider.
✓ 19 years in practice
▲ Top 4% volume in TX
$10,675 industry payments
Medicare Practice Summary
Medicare Utilization ↗8,333
Medicare services
Top 4% in TX for internal medicine
4,993
Unique beneficiaries
$201
Avg. Medicare payment
Medicare patients only (65+ / disabled) · Not a quality rating · How to read this →
~439 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 |
|---|---|---|---|
| Regadenoson injection (Lexiscan) for heart stress test An injection of regadenoson, a medication used to stress the heart during diagnostic testing. |
1,840 | $43 | $162 |
| 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. |
1,575 | $10 | $52 |
| 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. |
1,273 | $87 | $330 |
| Rubidium rb-82, diagnostic, per study dose, up to 60 millicuries | 463 | $595 | $1,567 |
| Echocardiogram, transthoracic An ultrasound of the heart that uses color to show blood flow, rate, direction, and valve function. |
456 | $145 | $696 |
| Nuclear stress test with CT scan A nuclear medicine imaging test that evaluates blood flow in the heart muscle at rest and during stress, performed alongside a concurrent CT scan. |
453 | $1,814 | $7,415 |
| PET scan of heart muscle blood flow A nuclear medicine imaging test that uses positron emission tomography (PET) to evaluate blood flow within the heart muscle. |
426 | $137 | $630 |
| 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. |
282 | $65 | $222 |
| 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. |
258 | $112 | $505 |
| Remote cardiac rhythm monitor evaluation, up to 30 days Review and analysis of data from a remote cardiac rhythm monitoring system over a period of up to 30 days. |
199 | $19 | $82 |
| Remote pacemaker monitoring, 90 days Remote assessment of a pacemaker system, including single, dual, multiple lead, or leadless devices, performed up to 90 days apart. |
122 | $21 | $105 |
| Office visit, established patient, complex (40-54 min) An office or outpatient visit for an existing patient lasting between 40 and 54 minutes. This level of service is determined by the total time spent on the date of the encounter. |
118 | $136 | $446 |
| Remote monitoring of implantable heart rhythm device Evaluation of data transmitted remotely from an implantable cardiovascular monitor, such as a loop recorder or subcutaneous cardiac rhythm monitor, over a period up to 30 days. |
107 | $26 | $115 |
| Remote pacemaker/defibrillator monitoring, 90 days Remote evaluation of a pacemaker or implantable defibrillator system within 90 days of the last check. |
97 | $16 | $79 |
| Ultrasound of arm or leg veins An ultrasound exam of the veins in the arm or leg. The test uses sound waves to check blood flow and may include compression and other maneuvers. |
94 | $143 | $606 |
| Continuous external EKG monitoring, 48 hours to 7 days This procedure involves recording, analyzing, and interpreting a continuous external electrocardiogram (EKG) over a period of more than 48 hours up to 7 days. |
90 | $190 | $788 |
| 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. |
62 | $146 | $620 |
| Sedation by physician, initial 15 minutes Administration of a drug to induce depression of consciousness by the physician performing a procedure. This code covers the initial 15 minutes of sedation for patients aged 5 years or older. |
60 | $10 | $158 |
| New patient office visit, complex (60-74 min) | 49 | $159 | $635 |
| Ultrasound guidance for blood vessel access Use of ultrasound imaging to help locate and access a blood vessel. This guidance assists healthcare providers in performing procedures such as inserting IV lines or drawing blood. |
46 | $11 | $46 |
| Ultrasound of arm or leg veins An ultrasound exam of the veins in one arm or leg using compression and other maneuvers to assess blood flow and check for blockages. |
43 | $92 | $372 |
| Continuous ECG monitoring, up to 30 days Continuous heart rhythm monitoring for up to 30 days, including professional review and reporting of the results. |
31 | $20 | $81 |
| 30-day continuous ECG with patient-triggered event transmission and review This procedure involves continuous electrocardiogram monitoring for up to 30 days, including the transmission of patient-triggered events. A healthcare professional reviews the data and provides a report. |
30 | $623 | $2,062 |
| Cardiac catheterization | 30 | $192 | $979 |
| Insertion of implantable heart rhythm monitor A small device is placed under the skin to continuously record the heart's electrical activity. This helps detect irregular heart rhythms that may not appear during a standard office visit. |
25 | $3,330 | $15,981 |
| Comprehensive metabolic blood panel A blood test that measures a group of chemicals, including glucose, electrolytes, and kidney and liver function markers. |
14 | $10 | $43 |
| Lipid panel (cholesterol and triglycerides) A blood test that measures cholesterol and triglyceride levels. |
14 | $13 | $55 |
| Initial hospital admission, high complexity Initial hospital inpatient or observation care for a new patient involving high-level medical decision making, with at least 75 minutes total time on the date of the encounter. |
14 | $135 | $625 |
| Complete blood count (CBC) with differential An automated laboratory test that measures the levels of red blood cells, white blood cells, and platelets in the blood, including a breakdown of the different types of white blood cells. |
13 | $8 | $32 |
| Pacemaker system evaluation Assessment of a pacemaker device, including single, dual, multiple lead, or leadless systems. |
13 | $27 | $89 |
| 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. |
13 | $76 | $332 |
| Pacemaker insertion with heart chamber electrodes A surgical procedure to implant a pacemaker device and place electrodes into the upper and lower chambers of the heart to regulate heart rhythm. |
12 | $389 | $1,673 |
| Initial hospital admission, moderate complexity Initial hospital inpatient or observation care for a new patient involving moderate-level medical decision making, with at least 55 minutes total time on the date of the encounter. |
11 | $101 | $422 |
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.
8.8% high complexity
30.5% medium
60.8% routine
Industry Payment Transparency
Open Payments through 2024 ↗$10,675
Total received (2018-2024)
Avg $1,525/year across 7 years
Top 8% in TX for internal medicine
27
Companies
267
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
$10,580 (99.1%)
Speaking / Promotional
Speaker programs, honoraria, and industry-sponsored educational events
$95 (0.9%)
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
2024
$1,796
2023
$1,917
2022
$2,054
2021
$386
2020
$694
2019
$1,148
2018
$2,680
Payments by company (2024)
Consulting
Speaking
Meals & Travel
Research
BIOTRONIK INC.
$4,029
Abbott Laboratories
$1,799
Novartis Pharmaceuticals Corporation
$1,541
Medtronic, Inc.
$1,020
Davol Inc.
$266
Amgen Inc.
$232
Acutus Medical, Inc.
$210
AstraZeneca Pharmaceuticals LP
$158
Boston Scientific Corporation
$145
Janssen Pharmaceuticals, Inc
$125
Actelion Pharmaceuticals US, Inc.
$121
Merck Sharp & Dohme LLC
$113
PFIZER INC.
$112
Baxter Healthcare
$112
E.R. Squibb & Sons, L.L.C.
$108
Tactile Systems Technology Inc
$93
Kiniksa Pharmaceuticals International, plc
$88
Impulse Dynamics (USA) Inc.
$86
Kiniksa Pharmaceuticals, Ltd.
$81
Kestra Medical Technology Services, Inc.
$73
UCB, Inc.
$34
Regeneron Healthcare Solutions, Inc.
$30
AGEPHA Pharma FZ LLC
$25
Alnylam Pharmaceuticals Inc.
$21
ZOLL Services LLC (A/K/A ZOLL LifeCor Corp)
$21
Medtronic Vascular, Inc.
$19
SANOFI-AVENTIS U.S. LLC
$15
Top 3 companies account for 69.0% of total payments
Associated products mentioned in payments ›
ASSURITY · Acticor · Allure CRT Pacemaker · Allure Quadra RF CRT Pacemaker · Arcalyst · Assure WCD · BIOMONITOR · BioMonitor · BodyGuardian · CAMZYOS · CLOSUREFAST · CONFIRM RX · COREVALVE EVOLUT R · Confirm Rx · Connectivity and Remote care · Corlanor · DUPIXENT · ELIQUIS · ENTRESTO · Edora · Edora 8 DR-T · Ensite Cardiac Mapping System · FASENRA · Fintepla · FlexAbility Ablation Catheter · Flexitouch Plus · GALLANT · Hillrom - Cardiac Ambulatory Monitor · Hillrom - Carnation Ambulatory Monitor · JOT DX · LEQVIO · LODOCO · LifeVest · MULTAQ · Merlin Connectivity and Remote · Mitra Clip system · ONPATTRO · OPSUMIT · OPTIMIZER · Orsiro Mission · PROCLAIM · Pacemakers · Phasix Mesh · RESONATE · Repatha · Reveal LINQ · Rivacor · Solia · TAGRISSO · VENASEAL · VERQUVO · WATCHMAN FLX · XARELTO
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 (99%) are for meals and travel — low-value interactions that are common across virtually all practicing physicians. Total industry engagement is in the top 8% for internal medicine in TX.
Equivalent to $128 per 100 Medicare services performed
Geographic Context
Internal medicine physicians within 10 mi
576
Per 100K population
88.0
County median income
$97,266
Nearest hospital
ST LUKE'S THE WOODLANDS HOSPITAL
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 measures how much public data is available about a provider — not how good they are. How we calculate this →
Summary
Dr. Nguyen is a cardiac & electrophysiology specialist, with above-average Medicare volume (top 4% in TX), with low-engagement industry engagement in the top 8% of TX peers, with 19 years of NPI registration.
This summary is auto-generated from federal data. It describes data availability and patterns — not clinical quality. Read our methodology →
Frequently Asked Questions
Is Dr. Nguyen experienced with regadenoson injection (lexiscan) for heart stress test?
Based on Medicare claims data, Dr. Nguyen performed 1,840 regadenoson injection (lexiscan) for heart stress test 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 $10,675 from 27 companies across 267 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 Shenandoah?
Dr. Nguyen's average Medicare payment per service is $201. 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. The Transparency Score measures 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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