James Andrew Buck, PA-C
Physician Assistant · San Francisco, CA
James Andrew Buck, PA-C is a physician assistant with a practice address in San Francisco, California, and NPI 1902959786, issued on Jan 18, 2007. Check the license (California PA15831, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- James Andrew Buck
- Credential
- PA-C
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- PA15831 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1580 Valencia St, San Francisco, CA 94110
- Phone
- (415) 642-0707
- Enumerated
- Jan 18, 2007
- Record last updated
- Dec 11, 2014 (not updated in 12 years: call before relying on the address or phone)
- Fax
- (415) 648-7988
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 14,451 in California → Look up another NPI →
Also registered at 1580 Valencia St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify James Andrew Buck in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license PA15831Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
76% fewer Medicare Part D claims than the average physician assistant in 2024
199 Medicare Part D claims for 77 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D. Brand-name drugs were 7% of claims. 41 claims were for opioids.
Most prescribed
- Diclofenac Sodium41 claims
- Oxycodone Hcl24 claims
- Lidocaine20 claims
- Amoxicillin15 claims
- Clindamycin Hcl13 claims
- Hydrocodone-Acetaminophen13 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: $80.93
4 payments; by number, the most common kind was food and beverage; the largest payer was Vertex Pharmaceuticals Incorporated. 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.
James Andrew Buck among 14,451 physician assistant records in California
James Andrew Buck, PA-C 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 2007, is newer than 13% of them.
- NPI issued2007 · 13% of these records are older, 78% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileNo · 50% of these records are
- Record last updated2014 · 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
- Connie Amorde, P.A.-CSan Francisco, CA 941101306884846
- Monica Bien, PASan Francisco, CA 941101144357138
- Daniel Chan, PA-CSan Francisco, CA 941101205926052
- Catherine Cucic, P.A.San Francisco, CA 941101326064866
- Jessica Dodge, PA-CSan Francisco, CA 941101306963772
- Kathryn Fontwit, PASan Francisco, CA 941101780701151
- Aldo Gomez, P.A.-CSan Francisco, CA 941101144382227
- Jasmine Jarrard, PASan Francisco, CA 941101679908362
Common questions
What is James Andrew Buck, PA-C's NPI number?
James Andrew Buck, PA-C's National Provider Identifier (NPI) is 1902959786, issued on Jan 18, 2007. An NPI identifies a provider in billing; it is not a license.
Where is James Andrew Buck, PA-C located?
The NPPES record lists a practice address at 1580 Valencia St, San Francisco, CA, 94110. Phone: (415) 642-0707. Providers update this record themselves, so call before visiting.
How can I verify James Andrew Buck, PA-C's license?
NPPES lists California license number PA15831, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does James Andrew Buck, PA-C prescribe under Medicare Part D?
In 2024, James Andrew Buck, PA-C had 199 Medicare Part D claims for 77 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.