Medicare Enrolled
Dr. Winston Chung, MD
Internal Medicine · Los Alamitos, 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. Chung 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. Chung
Dr. Winston Chung is an internal medicine specialist in Los Alamitos, CA, with 19 years of NPI registration. Based on federal Medicare data, Dr. Chung performed 3,126 Medicare services across 1,449 unique beneficiaries.
Between the years covered by Open Payments, Dr. Chung received a total of $1,234 from 21 pharmaceutical and/or device companies across 49 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. Chung 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
$1,234 industry payments
Medicare Practice Summary
Medicare Utilization ↗3,126
Medicare services
Top 10% in CA for internal medicine
1,449
Unique beneficiaries
$77
Avg. Medicare payment
Medicare patients only (65+ / disabled) · How to read this →
~165 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 |
|---|---|---|---|
| Hospital follow-up visit, high complexity Subsequent hospital inpatient or observation care for an existing patient involving high-level medical decision making, with at least 50 minutes total time on the date of the encounter. |
647 | $102 | $184 |
| 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. |
532 | $67 | $150 |
| 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. |
283 | $57 | $118 |
| Remote patient monitoring management, 20 min/month Management based on results from remote vital sign monitoring for the first 20 minutes per calendar month. |
259 | $43 | $80 |
| 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. |
217 | $47 | $90 |
| Remote vital sign monitoring management, each additional 20 minutes This code covers the time spent by a provider managing patient data from remote vital sign monitoring devices. It applies to each additional 20-minute increment beyond the initial monthly service period. |
178 | $34 | $65 |
| 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. |
148 | $148 | $320 |
| Annual wellness visit, follow-up A follow-up annual wellness visit that includes a personalized prevention plan of service. |
122 | $143 | $250 |
| Critical care, first 30-74 min Emergency medical care for a critically ill or injured patient lasting between 30 and 74 minutes. This service involves direct patient care and medical decision making to stabilize the patient. |
106 | $180 | $460 |
| Hospital discharge day management, 30 minutes or less This service covers the final day of hospital care when the patient is being discharged. It includes coordination of care and instructions for the patient within a time frame of 30 minutes or less. |
103 | $69 | $127 |
| 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. |
97 | $106 | $215 |
| Blood draw (venipuncture) Insertion of a needle into a vein to collect a blood sample. |
62 | $8 | $14 |
| Flu vaccine administration This procedure involves the administration of the influenza virus vaccine. It covers the process of delivering the vaccine to the patient. |
52 | $34 | $40 |
| Flu vaccine, quadrivalent A flu shot containing four strains of the influenza virus to help prevent seasonal influenza infection. |
49 | $75 | $119 |
| Remote physiologic monitoring setup and education Initial setup of remote monitoring equipment and patient education on its use. |
45 | $18 | $35 |
| 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. |
35 | $43 | $90 |
| 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. |
33 | $12 | $33 |
| 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. |
31 | $90 | $173 |
| Nursing facility visit, high complexity A follow-up visit by a healthcare provider at a nursing facility for an established patient. The visit involves a high level of medical decision making and takes at least 45 minutes. |
31 | $133 | $244 |
| 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. |
24 | $37 | $70 |
| 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. |
23 | $43 | $95 |
| Telephone medical discussion, 11-20 minutes A phone conversation with a physician lasting between 11 and 20 minutes. |
20 | $53 | $155 |
| 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. |
18 | $97 | $185 |
| Nursing facility visit, established patient, straightforward A follow-up visit by a healthcare provider at a nursing facility for an established patient. The visit involves straightforward medical decision making and lasts at least 10 minutes. |
11 | $22 | $70 |
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 ↗$1,234
Total received (2018-2024)
Avg $176/year across 7 years
Top 32% in CA for internal medicine
A higher payment rank reflects disclosed industry relationships (consulting, research, speaking) common among subspecialists — not wrongdoing.
21
Companies
49
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
$1,202 (97.4%)
Speaking / Promotional
Speaker programs, honoraria, and industry-sponsored educational events
$32 (2.6%)
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
2024
$99
2023
$297
2022
$162
2021
$161
2020
$98
2019
$321
2018
$96
Payments by company (2024)
Consulting
Speaking
Meals & Travel
Research
Merck Sharp & Dohme LLC
$32
Bayer Healthcare Pharmaceuticals Inc.
$30
Amgen Inc.
$21
Electromed, Inc.
$17
Top 3 companies account for 83.0% of 2024 payments
All-time payments by company (2018-2024) ›
Janssen Pharmaceuticals, Inc
$251
Alkermes, Inc.
$118
Karyopharm Therapeutics Inc.
$108
AbbVie Inc.
$88
Gilead Sciences, Inc.
$62
Lilly USA, LLC
$61
Merck Sharp & Dohme LLC
$60
Allergan, Inc.
$51
Novo Nordisk Inc
$48
GlaxoSmithKline, LLC.
$46
Otsuka America Pharmaceutical, Inc.
$46
ABBVIE INC.
$42
Electromed, Inc.
$35
Philips Electronics North America Corporation
$35
Merck Sharp & Dohme Corporation
$33
Seqirus USA Inc
$32
Bayer Healthcare Pharmaceuticals Inc.
$30
E.R. Squibb & Sons, L.L.C.
$24
SUN PHARMACEUTICAL INDUSTRIES INC.
$22
Amgen Inc.
$21
Biohaven Pharmaceutical Holding Company Ltd.
$19
Top 3 companies account for 38.7% of all-time payments
Associated products mentioned in payments ›
ARISTADA · AVYCAZ · DIFICID · ELIQUIS · EVENITY · Fluad · GARDASIL · GARDASIL 9 · JYNARQUE · KAPSPARGO · Kerendia · MOUNJARO · NURTEC ODT · Ozempic · Rybelsus · S&RC Und · SAMSCA · SHINGRIX · SMARTVEST · TEFLARO · TRULICITY · UBRELVY · Veklury · XARELTO · XPOVIO
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 (97%) are for meals and travel — low-value interactions that are common across virtually all practicing physicians.
Geographic Context
Internal medicine physicians within 10 mi
3,780
Per 100K population
119.5
County median income
$113,702
Nearest hospital
UCI HEALTH - LOS ALAMITOS
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. Chung is a clinical cardiology specialist, with above-average Medicare volume (top 10% in CA), with low-engagement industry engagement, 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. Chung experienced with hospital follow-up visit, high complexity?
Based on Medicare claims data, Dr. Chung performed 647 hospital follow-up visit, high complexity 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. Chung receive payments from pharmaceutical companies?
Yes. Dr. Chung received a total of $1,234 from 21 companies across 49 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. Chung's costs compare to other internal medicine physicians in Los Alamitos?
Dr. Chung's average Medicare payment per service is $77. 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. Chung) 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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