Clara Chen
Geriatric Medicine (Internal Medicine) Physician · Oakland, CA
Clara Chen is a geriatric medicine (internal medicine) physician with a practice address in Oakland, California, and NPI 1336883024, issued on Apr 27, 2022. Check the license on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Clara Chen
- Primary taxonomy
- Geriatric Medicine (Internal Medicine) Physician 207RG0300X
- License number
- MD.MD.61679880 WA
Self-reported in NPPES; status is on the state search - Practice location
- 835 Webster St, Oakland, CA 94607
- Phone
- (510) 318-5800
- Enumerated
- Apr 27, 2022
- Record last updated
- Jul 4, 2026
- Entity
- Type 1 · individual
8 nearest geriatric medicine (internal medicine) physician records → All 532 in California → Look up another NPI →
Also registered at 835 Webster St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Nhat Bui, AGNPNurse Practitioner1457807588
- Li Jun Chen, REGISTERED NURSERegistered Nurse1629612239
- Yuk Pui ChingRegistered Nurse1316594443
- Heidi ChiuRegistered Nurse1710742580
- David HoangCommunity Health Worker1407597057
- Trang HuaClinical Social Worker1295416576
Verify Clara Chen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of CaliforniaCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
96% fewer Medicare Part D claims than the average geriatric medicine (internal medicine) physician in 2024
176 Medicare Part D claims for 58 beneficiaries, against an average of 4,246 among the 3,116 providers of this specialty who prescribed in Part D.
Most prescribed
- Amlodipine Besylate22 claims
- Omeprazole11 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.
Clara Chen among 532 geriatric medicine (internal medicine) physician records in California
Clara Chen is one of 532 geriatric medicine (internal medicine) physician records with a practice address in California. 77% 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 97% of them.
- NPI issued2022 · 97% of these records are older, 2% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileNo · 51% of these records are
- Record last updated2026 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0300X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Geriatric Medicine (Internal Medicine) Physician providers in California
There are 532 geriatric medicine (internal medicine) physician records in California.
All 532 in California → Every provider in Oakland → Geriatric Medicine (Internal Medicine) Physician nationwide →
The 8 geriatric medicine (internal medicine) physician records with the nearest ZIP codes
- Timothy Parenteau, MD, PHDOakland, CA 946091790272599
- Robert Tufft, MDOakland, CA 946091619010121
- Catherine Buchanan, M.D.Oakland, CA 946101114903341
- Mala KrishnamoorthyOakland, CA 946111194145920
- James Mittelberger, M.D.Oakland, CA 946111508876194
- Samira Molaei, MDOakland, CA 946111053701466
- Julie Sandoval-Perry, MDOakland, CA 946111225180029
- Anuradha Shankar, MDOakland, CA 946111205914082
Common questions
What is Clara Chen's NPI number?
Clara Chen's National Provider Identifier (NPI) is 1336883024, issued on Apr 27, 2022. An NPI identifies a provider in billing; it is not a license.
Where is Clara Chen located?
The NPPES record lists a practice address at 835 Webster St, Oakland, CA, 94607. Phone: (510) 318-5800. Providers update this record themselves, so call before visiting.
How can I verify Clara Chen's license?
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 Clara Chen prescribe under Medicare Part D?
In 2024, Clara Chen had 176 Medicare Part D claims for 58 beneficiaries; the average among geriatric medicine (internal medicine) physician prescribers was 4,246. 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.