James Yng Jen Chen, M.D.
Internal Medicine Physician · San Diego, CA
James Yng Jen Chen, M.D. is an internal medicine physician with a practice address in San Diego, California, and NPI 1265495691, issued on Apr 7, 2006. Check the license (California A86644, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- James Yng Jen Chen
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A86644 CA
Self-reported in NPPES; status is on the state search - Practice location
- 11513 Trailbrook LN, San Diego, CA 92128
- Phone
- (619) 955-7783
- Enumerated
- Apr 7, 2006
- Record last updated
- Feb 6, 2025
- Fax
- (619) 793-4898
- Medicaid ID
- 00A866440 CA
- Medicare enrollment
- Enrolled (PECOS I20051004001114); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Verify James Yng Jen Chen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A86644Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
94% fewer Medicare Part D claims than the average internal medicine physician in 2024
175 Medicare Part D claims for 66 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 13 claims were for opioids.
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
- Scripps Health Inpatient Providers Medical Group IncSan Diego, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
James Yng Jen Chen among 17,696 internal medicine physician records in California
James Yng Jen Chen, M.D. 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
- Graduated2002 · median 2004 among the 11,065 with a school on file
- Record last updated2025 · 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).
961 internal medicine physician records list a practice address in San Diego
They are 961 of the 52,937 NPPES records with a practice address in San Diego, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in San Diego → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Brian Barmettler, M.D.San Diego, CA 921281801822507
- Maria Bautista, M.D.San Diego, CA 921281528167723
- Julie Blockowicz, M.D.San Diego, CA 921281174557508
- Lynne Champagne, MDSan Diego, CA 921281952412181
- Siu Ming Geary, M.D.San Diego, CA 921281073615605
- Richard Gilroy, MDSan Diego, CA 921281821157223
- Maryam Hekmat, M.D.San Diego, CA 921281497867428
- Priya Jagasia, M.D.San Diego, CA 921281679641971
Common questions
What is James Yng Jen Chen, M.D.'s NPI number?
James Yng Jen Chen, M.D.'s National Provider Identifier (NPI) is 1265495691, issued on Apr 7, 2006. An NPI identifies a provider in billing; it is not a license.
Where is James Yng Jen Chen, M.D. located?
The NPPES record lists a practice address at 11513 Trailbrook LN, San Diego, CA, 92128. Phone: (619) 955-7783. Providers update this record themselves, so call before visiting.
How can I verify James Yng Jen Chen, M.D.'s license?
NPPES lists California license number A86644, 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 James Yng Jen Chen, M.D. prescribe under Medicare Part D?
In 2024, James Yng Jen Chen, M.D. had 175 Medicare Part D claims for 66 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.