Yi-Jen Chen, MD
Radiation Oncology Physician · Duarte, CA
Yi-Jen Chen, MD is a radiation oncology physician with a practice address in Duarte, California, and NPI 1972698868, issued on Oct 4, 2006. Check the license (California A69910, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Yi-Jen Chen
- Credential
- MD
- Primary taxonomy
- Radiation Oncology Physician 2085R0001X
- License number
- A69910 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1500 E Duarte RD, Duarte, CA 91010
- Phone
- (626) 359-8111
- Enumerated
- Oct 4, 2006
- Record last updated
- Nov 23, 2020 (not updated in 6 years: call before relying on the address or phone)
- Medicaid ID
- 00A699100 CA
- Medicare enrollment
- Enrolled (PECOS I20090320000424); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest radiation oncology physician records → All 735 in California → Look up another NPI →
Also registered at 1500 E Duarte RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Avo Artinyan, MDSurgical Oncology Physician1609934942
- Razmig Babikian, RN, FNP-BCFamily Nurse Practitioner1295176394
- Jennifer Baecker, MSN, ANPGerontology Nurse Practitioner1548689649
- Sharon Baik, PHDClinical Psychologist1316654577
- Sarkis Baltayian, MDAnesthesiology Physician1932165776
- Elizabeth Bernardi, PA CPhysician Assistant1699980896
Verify Yi-Jen Chen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A69910Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
89% fewer Medicare Part D claims than the average radiation oncology physician in 2024
15 Medicare Part D claims for 11 beneficiaries, against an average of 134 among the 4,851 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 99.1 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. 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, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $214.25
2 payments; by number, the most common kind was food and beverage; the largest payer was Accuray Incorporated. The 3,275 providers of this specialty with any payment received $1,897.85 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
- City OF Hope Medical FoundationDuarte, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Yi-Jen Chen among 735 radiation oncology physician records in California
Yi-Jen Chen, MD is one of 735 radiation oncology 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 2006, is newer than 16% of them.
- NPI issued2006 · 16% of these records are older, 55% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 74% of these records are
- Graduated1984 · median 2005 among the 545 with a school on file
- Record last updated2020 · 55% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2085R0001X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
16 radiation oncology physician records list a practice address in Duarte
They are 16 of the 1,287 NPPES records with a practice address in Duarte, and 735 radiation oncology physician records in California.
All 735 in California → Every provider in Duarte → Radiation Oncology Physician nationwide →
The 8 radiation oncology physician records with the nearest ZIP codes
- Arya Amini, M.D.Duarte, CA 910101487910774
- Jose Bazan, MDDuarte, CA 910101851535504
- Savita Dandapani, M.D. , PH.D.Duarte, CA 910101619141751
- Scott Glaser, MDDuarte, CA 910101750643136
- Hyun Kim, MDDuarte, CA 910101467718379
- Heather McGee, MD, PHDDuarte, CA 910101447593678
- Eric Radany, MDDuarte, CA 910101346346897
- Andrew Raubitschek, MDDuarte, CA 910101407941289
Common questions
What is Yi-Jen Chen, MD's NPI number?
Yi-Jen Chen, MD's National Provider Identifier (NPI) is 1972698868, issued on Oct 4, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Yi-Jen Chen, MD located?
The NPPES record lists a practice address at 1500 E Duarte RD, Duarte, CA, 91010. Phone: (626) 359-8111. Providers update this record themselves, so call before visiting.
How can I verify Yi-Jen Chen, MD's license?
NPPES lists California license number A69910, 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 Yi-Jen Chen, MD prescribe under Medicare Part D?
In 2024, Yi-Jen Chen, MD had 15 Medicare Part D claims for 11 beneficiaries; the average among radiation oncology physician prescribers was 134. Part D covers Medicare prescriptions only.
What is Yi-Jen Chen, MD's MIPS final score?
The 2023 MIPS final score is 99.1 of 100, reported for the practice group. 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.