Marcus Justin Chen
Physician Assistant · San Francisco, CA
Marcus Justin Chen is a physician assistant with a practice address in San Francisco, California, and NPI 1447895735, issued on Nov 11, 2019. Check the license with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Marcus Justin Chen
- Primary taxonomy
- Physician Assistant 363A00000X
- Practice location
- 2425 Geary Blvd, San Francisco, CA 94115
- Phone
- (415) 508-8690
- Enumerated
- Nov 11, 2019
- Record last updated
- Feb 11, 2022
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 14,451 in California → Look up another NPI →
Also registered at 2425 Geary Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Catherine Grace Alejo, NPFamily Nurse Practitioner1932273521
Verify Marcus Justin Chen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this professionCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
82% fewer Medicare Part D claims than the average physician assistant in 2024
148 Medicare Part D claims for 75 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D. 57 claims were for opioids.
Most prescribed
- Oxycodone Hcl49 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: $48.45
1 payment: food and beverage; the largest payer was Esperion Therapeutics, Inc. The 64,719 providers of this specialty with any payment received $841.65 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.
Marcus Justin Chen among 14,451 physician assistant records in California
Marcus Justin Chen is one of 14,451 physician assistant records with a practice address in California. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2019, is newer than 56% of them.
- NPI issued2019 · 56% of these records are older, 38% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileNo · 50% of these records are
- Record last updated2022 · 40% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363A00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Physician Assistant providers in California
There are 14,451 physician assistant records in California.
All 14,451 in California → Every provider in San Francisco → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Melody Berman, PACSan Francisco, CA 941151538206875
- Julianne Blythe, PA-CSan Francisco, CA 941151912058017
- Sandra Hansen, P.A-CSan Francisco, CA 941151104871334
- Laura Kirk, PA-CSan Francisco, CA 941151003814989
- Stephanie Messina, PASan Francisco, CA 941151912202987
- Brent Price, P.A.-C.San Francisco, CA 941151548308752
- Elizabeth Price, PASan Francisco, CA 941151669687687
- James Row, NP,PA-CSan Francisco, CA 941151760565691
Common questions
What is Marcus Justin Chen's NPI number?
Marcus Justin Chen's National Provider Identifier (NPI) is 1447895735, issued on Nov 11, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Marcus Justin Chen located?
The NPPES record lists a practice address at 2425 Geary Blvd, San Francisco, CA, 94115. Phone: (415) 508-8690. Providers update this record themselves, so call before visiting.
How can I verify Marcus Justin Chen's license?
Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Marcus Justin Chen prescribe under Medicare Part D?
In 2024, Marcus Justin Chen had 148 Medicare Part D claims for 75 beneficiaries; the average among physician assistant prescribers was 830. 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.