Won Kye Yu, M.D.
Gastroenterology Physician · Tustin, CA
Won Kye Yu, M.D. is a gastroenterology physician with a practice address in Tustin, California, and NPI 1720065303, issued on Dec 27, 2005. Check the license (California A77275, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Won Kye Yu
- Credential
- M.D.
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- A77275 CA
Self-reported in NPPES; status is on the state search - Practice location
- 17400 Irvine Blvd Ste F, Tustin, CA 92780
- Phone
- (714) 937-9400
- Enumerated
- Dec 27, 2005
- Record last updated
- Sep 28, 2022
- Fax
- (714) 937-9404
- Medicare enrollment
- Enrolled (PECOS I20040610001081); accepts Medicare assignment
- Medical or professional school
- Temple University School Of Medicine, 2000
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 2,140 in California → Look up another NPI →
Also registered at 17400 Irvine Blvd Ste F
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Khaldoun Debian, M.D.Gastroenterology Physician1932168796
- Mohammad ElbattaGastroenterology Physician1316204894
Verify Won Kye Yu in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A77275Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3.4 times the Medicare Part D claims of the average gastroenterology physician in 2024
2,782 Medicare Part D claims for 860 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 17% of claims. 15 claims were for opioids.
Most prescribed
- Pantoprazole Sodium762 claims
- Sod Sulf-Potass Sulf-Mag Sulf434 claims
- Omeprazole112 claims
- Dicyclomine Hcl98 claims
- Dexlansoprazole Dr84 claims
- Sucralfate82 claims
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.
No measured MIPS final score for 2023
CMS assigned the neutral MIPS final score of 75 without scoring Quality, Cost, Promoting Interoperability or Improvement Activities. It is an administrative threshold, so PlainDoctor does not compare it with measured clinicians.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $1,177.95
64 payments; by number, the most common kind was food and beverage; the largest payer was Aimmune Therapeutics, Inc. The 13,350 providers of this specialty with any payment received $5,015.95 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.
Won Kye Yu among 2,140 gastroenterology physician records in California
Won Kye Yu, M.D. is one of 2,140 gastroenterology physician records with a practice address in California. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 93% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated2000 · median 2002 among the 1,538 with a school on file
- Record last updated2022 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0100X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in California
There are 2,140 gastroenterology physician records in California.
All 2,140 in California → Every provider in Tustin → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Khaldoun Debian, M.D.Tustin, CA 927801932168796
- Mohammad ElbattaTustin, CA 927801316204894
- Moothedath Menon, M.D.Tustin, CA 927801336134014
- Ravindra Alapati, MDAnaheim, CA 928011912989773
- Ambika Bali, MDAnaheim, CA 928011427096478
- Sitaraman Jyotheeswaran, M.D.Anaheim, CA 928011952469272
- Brian Riff, MDAnaheim, CA 928011194969030
- Kavita Singh, MDAnaheim, CA 928011255597985
Common questions
What is Won Kye Yu, M.D.'s NPI number?
Won Kye Yu, M.D.'s National Provider Identifier (NPI) is 1720065303, issued on Dec 27, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Won Kye Yu, M.D. located?
The NPPES record lists a practice address at 17400 Irvine Blvd Ste F, Tustin, CA, 92780. Phone: (714) 937-9400. Providers update this record themselves, so call before visiting.
How can I verify Won Kye Yu, M.D.'s license?
NPPES lists California license number A77275, 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 Won Kye Yu, M.D. prescribe under Medicare Part D?
In 2024, Won Kye Yu, M.D. had 2,782 Medicare Part D claims for 860 beneficiaries; the average among gastroenterology physician prescribers was 811. Part D covers Medicare prescriptions only.
What is Won Kye Yu, M.D.'s MIPS final score?
CMS assigned the neutral MIPS final score of 75 for 2023 without scoring any category, so it is not a measured result.
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.