Willa Jolie Chen, MD, MPH
Family Medicine Physician · Oakland, CA
Willa Jolie Chen, MD, MPH is a family medicine physician with a practice address in Oakland, California, and NPI 1497496244, issued on Apr 5, 2022. Check the license (California A189668, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Willa Jolie Chen
- Credential
- MD, MPH
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- A189668 CA
Self-reported in NPPES; status is on the state search - Practice location
- 350 Hawthorne Ave RM 2316, Oakland, CA 94609
- Phone
- (510) 869-6883
- Enumerated
- Apr 5, 2022
- Record last updated
- Sep 18, 2025
- Fax
- (510) 869-6888
- Medicare enrollment
- Enrolled (PECOS I20250918003943); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 350 Hawthorne Ave RM 2316
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Martin Garcia, M.D.Hospitalist Physician1619084423
- Naveen Thota, MDInternal Medicine Physician1972717304
Verify Willa Jolie Chen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A189668Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
87% fewer Medicare Part D claims than the average family medicine physician in 2024
446 Medicare Part D claims for 91 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims.
Most prescribed
- Atorvastatin Calcium46 claims
- Amlodipine Besylate30 claims
- Omega-3 Acid Ethyl Esters28 claims
- Losartan Potassium23 claims
- Finasteride21 claims
- Metoprolol Succinate18 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
- Sutter Bay Medical FoundationBerkeley, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Willa Jolie Chen among 17,133 family medicine physician records in California
Willa Jolie Chen, MD, MPH 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 2022, is newer than 94% of them.
- NPI issued2022 · 94% of these records are older, 3% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated2022 · median 2005 among the 10,652 with a school on file
- Record last updated2025 · 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).
Family Medicine Physician providers in California
There are 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in Oakland → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Noha Aboelata, MDOakland, CA 946091447246293
- Janet Arnesty, MDOakland, CA 946091669464152
- Andrea Franchett, M.D.Oakland, CA 946091417991183
- John Good, MDOakland, CA 946091629041769
- Nayvin Gordon, MDOakland, CA 946091518973510
- Anthony Jones, MDOakland, CA 946091538246194
- Michael Kern, M.D.Oakland, CA 946091861436925
- Bruce Lawrence, M.D.Oakland, CA 946091710901616
Common questions
What is Willa Jolie Chen, MD, MPH's NPI number?
Willa Jolie Chen, MD, MPH's National Provider Identifier (NPI) is 1497496244, issued on Apr 5, 2022. An NPI identifies a provider in billing; it is not a license.
Where is Willa Jolie Chen, MD, MPH located?
The NPPES record lists a practice address at 350 Hawthorne Ave RM 2316, Oakland, CA, 94609. Phone: (510) 869-6883. Providers update this record themselves, so call before visiting.
How can I verify Willa Jolie Chen, MD, MPH's license?
NPPES lists California license number A189668, 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 Willa Jolie Chen, MD, MPH prescribe under Medicare Part D?
In 2024, Willa Jolie Chen, MD, MPH had 446 Medicare Part D claims for 91 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.