Medicare Enrolled
Dr. Won Yu, M.D.
Gastroenterology · Tustin, 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. Yu 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. Yu
Dr. Won Yu is a gastroenterology specialist in Tustin, CA, with 20 years of NPI registration. Based on federal Medicare data, Dr. Yu performed 1,330 Medicare services across 1,022 unique beneficiaries.
Between the years covered by Open Payments, Dr. Yu received a total of $6,923 from 38 pharmaceutical and/or device companies across 384 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in gastroenterology. 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. Yu 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 in practice
▲ Top 22% volume in CA
$6,923 industry payments
Medicare Practice Summary
Medicare Utilization ↗1,330
Medicare services
Top 22% in CA for gastroenterology
1,022
Unique beneficiaries
$72
Avg. Medicare payment
Medicare patients only (65+ / disabled) · How to read this →
~66 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 |
|---|---|---|---|
| Tissue pathology examination, moderate complexity A laboratory test where a pathologist examines tissue samples under a microscope to analyze cellular details. This intermediate complexity procedure involves specialized techniques to identify abnormalities in the tissue. |
433 | $31 | $121 |
| 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. |
173 | $98 | $201 |
| Upper GI endoscopy with biopsy A procedure to collect tissue samples from the esophagus, stomach, or upper small intestine using a flexible tube with a camera. The samples are examined to check for abnormalities. |
156 | $69 | $620 |
| Special stain test for organisms A laboratory test using special stains on tissue slides to identify microorganisms. The process includes the technical preparation of the slides and a professional interpretation of the results. |
145 | $22 | $174 |
| 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. |
128 | $129 | $273 |
| Colon polyp removal with endoscopic snare This procedure removes polyps or growths from the large bowel using a flexible tube with a camera and a wire loop tool. The snare is used to cut off the growths during the examination. |
63 | $193 | $937 |
| Colonoscopy with biopsy A procedure to collect tissue samples from the large intestine using a flexible tube with a camera. The samples are examined to check for abnormalities or disease. |
57 | $128 | $836 |
| Telephone medical discussion, 11-20 minutes A phone conversation with a physician lasting between 11 and 20 minutes. |
36 | $70 | $130 |
| 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. |
33 | $78 | $182 |
| Colonoscopy A diagnostic exam of the large bowel using a flexible endoscope to visualize the interior of the colon. |
20 | $146 | $702 |
| 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. |
20 | $9 | $50 |
| 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. |
20 | $67 | $145 |
| Balloon dilation of esophagus, stomach, or upper small bowel, less than 3.0 cm A procedure using a flexible endoscope to widen a narrowed section of the esophagus, stomach, or upper small bowel with a balloon that is less than 3.0 cm in length. |
18 | $105 | $285 |
| 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. |
15 | $93 | $170 |
| Colonoscopy for colorectal cancer screening, high risk A colonoscopy performed to screen for colorectal cancer in individuals identified as being at high risk for the disease. |
13 | $192 | $702 |
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 ↗$6,923
Total received (2018-2024)
Avg $989/year across 7 years
Top 24% in CA for gastroenterology
A higher payment rank reflects disclosed industry relationships (consulting, research, speaking) common among subspecialists — not wrongdoing.
38
Companies
384
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
$6,923 (100.0%)
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
2024
$1,178
2023
$1,193
2022
$1,318
2021
$1,251
2020
$719
2019
$555
2018
$709
Payments by company (2024)
Consulting
Speaking
Meals & Travel
Research
AIMMUNE THERAPEUTICS, INC.
$210
Takeda Pharmaceuticals U.S.A., Inc.
$158
Janssen Biotech, Inc.
$149
PFIZER INC.
$147
Madrigal Pharmaceuticals
$84
ALBIREO PHARMA, INC.
$62
Gilead Sciences, Inc.
$61
Salix Pharmaceuticals, a division of Bausch Health US, LLC
$52
Lilly USA, LLC
$48
Celgene Corporation
$42
Phathom Pharmaceuticals, Inc.
$40
GENZYME CORPORATION
$27
IRONWOOD PHARMACEUTICALS, INC
$23
Ferring Pharmaceuticals Inc.
$22
VIVUS LLC
$19
ABBVIE INC.
$19
Regeneron Healthcare Solutions, Inc.
$14
Top 3 companies account for 43.9% of 2024 payments
All-time payments by company (2018-2024) ›
Salix Pharmaceuticals, a division of Bausch Health US, LLC
$1,330
Takeda Pharmaceuticals U.S.A., Inc.
$1,217
Janssen Biotech, Inc.
$714
AbbVie Inc.
$428
PFIZER INC.
$396
Gilead Sciences, Inc.
$377
Nestle HealthCare Nutrition Inc.
$316
Intercept Pharmaceuticals, Inc.
$223
AIMMUNE THERAPEUTICS, INC.
$210
ABBVIE INC.
$170
RedHill Biopharma Inc.
$149
Daiichi Sankyo Inc.
$147
Ferring Pharmaceuticals Inc.
$128
Novo Nordisk Inc
$125
Madrigal Pharmaceuticals
$84
INTERCEPT PHARMACEUTICALS, INC.
$72
NESTLE HEALTHCARE NUTRITION INC.
$63
Celgene Corporation
$63
ALBIREO PHARMA, INC.
$62
Allergan Inc.
$57
Ironwood Pharmaceuticals, Inc
$57
Merck Sharp & Dohme Corporation
$54
GENZYME CORPORATION
$51
Lilly USA, LLC
$48
Regeneron Healthcare Solutions, Inc.
$45
Phathom Pharmaceuticals, Inc.
$40
Evoke Pharma, Inc.
$39
VIVUS LLC
$38
Alfasigma USA, Inc.
$30
IRONWOOD PHARMACEUTICALS, INC
$23
QOL Medical, LLC
$23
GlaxoSmithKline, LLC.
$23
Ardelyx, Inc.
$23
W. L. Gore & Associates, Inc.
$21
Shionogi Inc
$20
Alnylam Pharmaceuticals Inc.
$20
Boston Scientific Corporation
$19
Grifols USA, LLC
$18
Top 3 companies account for 47.1% of all-time payments
Associated products mentioned in payments ›
ANORO · Albutein · Amitiza · Bylvay · CARDIOFORM Septal Occluder · CIMZIA · CLENPIQ · CREON · DIFICID · DUPIXENT · Dexilant · ENTYVIO · Entyvio · Epclusa · GATTEX · GIMOTI · GIVLAARI · General - Biopsy · HUMIRA · IBSRELA · INJECTAFER · IQIRVO · LINZESS · Linzess · MAVYRET · MOTEGRITY · Motegrity · Movantik · OCALIVA · OMVOH · QSYMIA · REBYOTA · RELISTOR ORAL · REMICADE · RESMETIROM · RYBELSUS · STELARA · SUCRAID · Symproic · TREMFYA · TRULANCE · Talicia · UCERIS · VIBERZI · VOQUEZNA · VOWST · XELJANZ · XIFAXAN · XIFAXANIBSD · ZENPEP · ZEPOSIA · Zelnorm
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.
Geographic Context
Gastroenterologists within 10 mi
243
Per 100K population
7.7
County median income
$113,702
Nearest hospital
FOOTHILL REGIONAL MEDICAL CENTER
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. Yu is a clinical cardiology specialist, with above-average Medicare volume (top 22% in CA), with low-engagement industry engagement, 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. Yu experienced with tissue pathology examination, moderate complexity?
Based on Medicare claims data, Dr. Yu performed 433 tissue pathology examination, moderate 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. Yu receive payments from pharmaceutical companies?
Yes. Dr. Yu received a total of $6,923 from 38 companies across 384 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. Yu's costs compare to other gastroenterologists in Tustin?
Dr. Yu's average Medicare payment per service is $72. 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. Yu) 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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