Willard Seiyoung Chung, MD
Family Medicine Physician · Santa Maria, CA
Willard Seiyoung Chung, MD is a family medicine physician with a practice address in Santa Maria, California, and NPI 1285898635, issued on Jul 15, 2008. Check the license (California A104456, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Willard Seiyoung Chung
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- A104456 CA
Self-reported in NPPES; status is on the state search - Practice location
- 235 S Palisade Dr, Santa Maria, CA 93454
- Phone
- (805) 739-3561
- Enumerated
- Jul 15, 2008
- Record last updated
- Dec 20, 2022
- Medicare enrollment
- Enrolled (PECOS I20100420000351); accepts Medicare assignment
- Medical or professional school
- Eastern Virginia Medical School, 2006
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 235 S Palisade Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- John Campbell, MDGeriatric Medicine (Family Medicine) Physician1346450970
- Debra D'Angelo, RD, CDERegistered Dietitian1841255874
Verify Willard Seiyoung Chung in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A104456Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
86% fewer Medicare Part D claims than the average family medicine physician in 2024
488 Medicare Part D claims for 210 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. 22 claims were for opioids.
Most prescribed
- Amoxicillin-Clavulanate Potass33 claims
- Furosemide25 claims
- Prednisone20 claims
- Cephalexin18 claims
- Doxycycline Hyclate18 claims
- Levofloxacin15 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.
The MIPS final score for 2023 (Medicare payment program): 96.5 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Vituity Hospitalists PCSan Luis Obispo, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Willard Seiyoung Chung among 17,133 family medicine physician records in California
Willard Seiyoung Chung, MD is one of 17,133 family medicine physician records with a practice address in California. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 53% of them.
- NPI issued2008 · 53% of these records are older, 42% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated2006 · median 2005 among the 10,652 with a school on file
- Record last updated2022 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
79 family medicine physician records list a practice address in Santa Maria
They are 79 of the 3,047 NPPES records with a practice address in Santa Maria, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in Santa Maria → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Jesse Arellano, MDSanta Maria, CA 934541285659284
- Thomas Dawes, MDSanta Maria, CA 934541386668473
- Kamlesh Desai, M.D.Santa Maria, CA 934541336137850
- Brian Desmond, M.D.Santa Maria, CA 934541972591865
- Eric Levy, M.D.Santa Maria, CA 934541891779021
- Richard McClaflin, MDSanta Maria, CA 934541912939075
- Brian Miyagishima, MDSanta Maria, CA 934541801870662
- Mary Jane Morash, MDSanta Maria, CA 934541154351195
Common questions
What is Willard Seiyoung Chung, MD's NPI number?
Willard Seiyoung Chung, MD's National Provider Identifier (NPI) is 1285898635, issued on Jul 15, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Willard Seiyoung Chung, MD located?
The NPPES record lists a practice address at 235 S Palisade Dr, Santa Maria, CA, 93454. Phone: (805) 739-3561. Providers update this record themselves, so call before visiting.
How can I verify Willard Seiyoung Chung, MD's license?
NPPES lists California license number A104456, 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 Willard Seiyoung Chung, MD prescribe under Medicare Part D?
In 2024, Willard Seiyoung Chung, MD had 488 Medicare Part D claims for 210 beneficiaries; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.
What is Willard Seiyoung Chung, MD's MIPS final score?
The 2023 MIPS final score is 96.5 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.