Patrick Chen, MD
Family Medicine Physician · Oakland, CA
Patrick Chen, MD is a family medicine physician with a practice address in Oakland, California, and NPI 1285933275, issued on Mar 16, 2011. Check the license (California A88391, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Patrick Chen
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- A88391 CA
Self-reported in NPPES; status is on the state search - Practice location
- 275 W Macarthur Blvd, Oakland, CA 94611
- Phone
- (510) 752-1000
- Enumerated
- Mar 16, 2011
- Record last updated
- Dec 14, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (510) 752-6851
- Medicare enrollment
- Enrolled (PECOS I20120223000740); accepts Medicare assignment
- Medical or professional school
- University Of Michigan Medical School, 2003
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 275 W Macarthur Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- David Aaronson, MDUrology Physician1215053129
- Paul-Andre Abboud, M.D.Emergency Medicine Physician1710065503
- Brittany Abeldt, MDPsychiatry Physician1982353884
- Bilal Abu-Alrub, DOStudent in an Organized Health Care Education/Training Program1609760768
- Walter Acuna, MDInternal Medicine Physician1972655108
- Brett Adams, MDStudent in an Organized Health Care Education/Training Program1841731098
Verify Patrick Chen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A88391Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
19% more Medicare Part D claims than the average family medicine physician in 2024
4,216 Medicare Part D claims for 571 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. 159 claims were for opioids.
Most prescribed
- Atorvastatin Calcium405 claims
- Amlodipine Besylate240 claims
- Lisinopril135 claims
- Levothyroxine Sodium125 claims
- Losartan Potassium110 claims
- Hydrocodone-Acetaminophen109 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.
Industry payments in 2024: $60.51
3 payments; by number, the most common kind was food and beverage; the largest payer was Smith+Nephew, Inc. The 55,478 providers of this specialty with any payment received $902.55 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Permanente Medical Group IncRichmond, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Patrick Chen among 17,133 family medicine physician records in California
Patrick Chen, MD 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 2011, is newer than 63% of them.
- NPI issued2011 · 63% of these records are older, 34% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated2003 · median 2005 among the 10,652 with a school on file
- Record last updated2021 · 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
- Leticia Aguilera-Ledesma, MDOakland, CA 946111871538637
- Nora Emon, MDOakland, CA 946111952337461
- Shannon Garrigan, MDOakland, CA 946111376617969
- Francis Kohrs, MDOakland, CA 946111720030877
- Ireneo Lazo, MDOakland, CA 946111528146305
- Jill Lederman, MDOakland, CA 946111427133198
- Gail Martin, MDOakland, CA 946111043398829
- Valerie McFarlane, MDOakland, CA 946111023193786
Common questions
What is Patrick Chen, MD's NPI number?
Patrick Chen, MD's National Provider Identifier (NPI) is 1285933275, issued on Mar 16, 2011. An NPI identifies a provider in billing; it is not a license.
Where is Patrick Chen, MD located?
The NPPES record lists a practice address at 275 W Macarthur Blvd, Oakland, CA, 94611. Phone: (510) 752-1000. Providers update this record themselves, so call before visiting.
How can I verify Patrick Chen, MD's license?
NPPES lists California license number A88391, 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 Patrick Chen, MD prescribe under Medicare Part D?
In 2024, Patrick Chen, MD had 4,216 Medicare Part D claims for 571 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.