Yi-Fen I. Chen, MD
Internal Medicine Physician · Santa Clara, CA
Yi-Fen I. Chen, MD is an internal medicine physician with a practice address in Santa Clara, California, and NPI 1073692711, issued on Nov 3, 2006. Check the license (California A74978, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Yi-Fen I. Chen
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A74978 CA
Self-reported in NPPES; status is on the state search - Practice location
- 710 Lawrence Expy, Santa Clara, CA 95051
- Phone
- (408) 851-1000
- Enumerated
- Nov 3, 2006
- Record last updated
- Feb 16, 2022
- Medicaid ID
- 00A749780 CA
- Medicare enrollment
- Enrolled (PECOS I20110210001114); accepts Medicare assignment
- Medical or professional school
- Indiana University School Of Medicine, 1998
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 710 Lawrence Expy
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Jamie Adiarte, PA-CPhysician Assistant1073824413
- Sarah Adut, PHDClinical Psychologist1609484831
- Najla Ahmadzia, M.D.Student in an Organized Health Care Education/Training Program1568692580
- Farhana Ahmed, MDHospitalist Physician1215110002
Verify Yi-Fen I. Chen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A74978Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
66% fewer Medicare Part D claims than the average internal medicine physician in 2024
1,072 Medicare Part D claims for 105 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Atorvastatin Calcium94 claims
- Atenolol85 claims
- Lisinopril78 claims
- Hydrochlorothiazide64 claims
- Simvastatin51 claims
- Levothyroxine Sodium50 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.
Bills Medicare through one group practice
- Permanente Medical Group IncSanta Clara, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Yi-Fen I. Chen among 17,696 internal medicine physician records in California
Yi-Fen I. Chen, MD is one of 17,696 internal medicine physician records with a practice address in California. 79% 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 5% of them.
- NPI issued2006 · 5% of these records are older, 56% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1998 · median 2004 among the 11,065 with a school on file
- Record last updated2022 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
140 internal medicine physician records list a practice address in Santa Clara
They are 140 of the 3,436 NPPES records with a practice address in Santa Clara, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Santa Clara → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
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- Asma Habib, MDSanta Clara, CA 950511033225784
- Lynn Huang, MDSanta Clara, CA 950511073690913
- Vijay Jain, MDSanta Clara, CA 950511073520342
- David Juan, M.D.Santa Clara, CA 950511205877222
- Parul Kumar, MDSanta Clara, CA 950511538176755
Common questions
What is Yi-Fen I. Chen, MD's NPI number?
Yi-Fen I. Chen, MD's National Provider Identifier (NPI) is 1073692711, issued on Nov 3, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Yi-Fen I. Chen, MD located?
The NPPES record lists a practice address at 710 Lawrence Expy, Santa Clara, CA, 95051. Phone: (408) 851-1000. Providers update this record themselves, so call before visiting.
How can I verify Yi-Fen I. Chen, MD's license?
NPPES lists California license number A74978, 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-Fen I. Chen, MD prescribe under Medicare Part D?
In 2024, Yi-Fen I. Chen, MD had 1,072 Medicare Part D claims for 105 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.