Jenna Chen
Internal Medicine Physician · Oakland, CA
Jenna Chen is an internal medicine physician with a practice address in Oakland, California, and NPI 1689294001, issued on Apr 27, 2020. Check the license (California 20A21773, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Jenna Chen
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 20A21773 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1411 E 31St St FL A2, Oakland, CA 94602
- Phone
- (510) 437-5039
- Enumerated
- Apr 27, 2020
- Record last updated
- Sep 12, 2023
- Fax
- (510) 535-7313
- Medicare enrollment
- Enrolled (PECOS I20231101002360); accepts Medicare assignment
- Medical or professional school
- Touro Un College Of Osteopathic Medicine, Vallejo, 2020
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Verify Jenna Chen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A21773Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
97% fewer Medicare Part D claims than the average internal medicine physician in 2024
91 Medicare Part D claims for 16 beneficiaries, against an average of 3,176 among the 108,855 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.
Bills Medicare through one group practice
- Alameda Health SystemOakland, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Jenna Chen among 17,696 internal medicine physician records in California
Jenna Chen 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 2020, is newer than 89% of them.
- NPI issued2020 · 89% of these records are older, 8% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2020 · median 2004 among the 11,065 with a school on file
- Record last updated2023 · 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).
432 internal medicine physician records list a practice address in Oakland
They are 432 of the 18,558 NPPES records with a practice address in Oakland, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Oakland → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Lyn Berry, MDOakland, CA 946021528078193
- Helen Driscoll, MDOakland, CA 946021720168230
- Julia Follette, M.D.Oakland, CA 946021730364480
- Sheira Freedman, MDOakland, CA 946021700896396
- Elaina Guerin, D.O.Oakland, CA 946021720286446
- Kathleen Hicks, M.D.Oakland, CA 946021902850209
- Francisco Isolani, M.D.Oakland, CA 946021326185265
- Annemarie Mallick, D.O.Oakland, CA 946021588633507
Common questions
What is Jenna Chen's NPI number?
Jenna Chen's National Provider Identifier (NPI) is 1689294001, issued on Apr 27, 2020. An NPI identifies a provider in billing; it is not a license.
Where is Jenna Chen located?
The NPPES record lists a practice address at 1411 E 31St St FL A2, Oakland, CA, 94602. Phone: (510) 437-5039. Providers update this record themselves, so call before visiting.
How can I verify Jenna Chen's license?
NPPES lists California license number 20A21773, 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 Jenna Chen prescribe under Medicare Part D?
In 2024, Jenna Chen had 91 Medicare Part D claims for 16 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.