Eugene John Won, MD
Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician · Orange, CA
Eugene John Won, MD is a thoracic surgery (cardiothoracic vascular surgery) physician with a practice address in Orange, California, and NPI 1659799658, issued on Apr 7, 2014. Check the license (California A139647, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Eugene John Won
- Credential
- MD
- Primary taxonomy
- Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician 208G00000X
- License number
- A139647 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1310 W Stewart Dr Ste 503, Orange, CA 92868
- Phone
- (714) 997-2224
- Enumerated
- Apr 7, 2014
- Record last updated
- Jun 1, 2022
- Medicare enrollment
- Enrolled (PECOS I20250220003729); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest thoracic surgery (cardiothoracic vascular surgery) physician records → All 634 in California → Look up another NPI →
Also registered at 1310 W Stewart Dr Ste 503
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Ryan Chan, PASurgical Physician Assistant1093184988
- Sohail Sareh, MDThoracic Surgery (Cardiothoracic Vascular Surgery) Physician1891158010
Verify Eugene John Won in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A139647Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
65% fewer Medicare Part D claims than the average thoracic surgery (cardiothoracic vascular surgery) physician in 2024
35 Medicare Part D claims for 12 beneficiaries, against an average of 101 among the 2,587 providers of this specialty who prescribed in Part D.
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $1,555.98
18 payments; by number, the most common kind was food and beverage; the largest payer was Abiomed. The 4,047 providers of this specialty with any payment received $7,828.84 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- North Texas Heart Surgery Center, PLLCPlano, TX
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Eugene John Won among 634 thoracic surgery (cardiothoracic vascular surgery) physician records in California
Eugene John Won, MD is one of 634 thoracic surgery (cardiothoracic vascular surgery) physician records with a practice address in California. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2014, is newer than 84% of them.
- NPI issued2014 · 84% of these records are older, 14% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 64% of these records are
- Graduated2014 · median 1997 among the 408 with a school on file
- Record last updated2022 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208G00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician providers in California
There are 634 thoracic surgery (cardiothoracic vascular surgery) physician records in California.
All 634 in California → Every provider in Orange → Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician nationwide →
The 8 thoracic surgery (cardiothoracic vascular surgery) physician records with the nearest ZIP codes
- Amir Abolhoda, MDOrange, CA 928681891875951
- Sevak Darbinian, M.D.Orange, CA 928681306859178
- Puneet Dhawan, M.D.Orange, CA 928681447247853
- Richard Fischel, MDOrange, CA 928681235210436
- Richard Gates, MDOrange, CA 928681568481414
- Dan Gutfinger, MDOrange, CA 928681720004690
- Hari Keshava, MDOrange, CA 928681801195029
- Ali Mahtabifard, MDOrange, CA 928681801872593
Common questions
What is Eugene John Won, MD's NPI number?
Eugene John Won, MD's National Provider Identifier (NPI) is 1659799658, issued on Apr 7, 2014. An NPI identifies a provider in billing; it is not a license.
Where is Eugene John Won, MD located?
The NPPES record lists a practice address at 1310 W Stewart Dr Ste 503, Orange, CA, 92868. Phone: (714) 997-2224. Providers update this record themselves, so call before visiting.
How can I verify Eugene John Won, MD's license?
NPPES lists California license number A139647, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Eugene John Won, MD prescribe under Medicare Part D?
In 2024, Eugene John Won, MD had 35 Medicare Part D claims for 12 beneficiaries; the average among thoracic surgery (cardiothoracic vascular surgery) physician prescribers was 101. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.