Marc Massey, PA-C
Physician Assistant · San Bruno, CA
Marc Massey, PA-C is a physician assistant with a practice address in San Bruno, California, and NPI 1649680364, issued on May 2, 2014. Check the license (California 57099, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Marc Massey
- Credential
- PA-C
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- 57099 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1310 EL Camino Real Ste J, San Bruno, CA 94066
- Phone
- (650) 270-2395
- Enumerated
- May 2, 2014
- Entity
- Type 1 · individual
Also registered at 1310 EL Camino Real Ste J
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Karen Feeney, M.DEmergency Medicine Physician1245267103
- Christian Molstrom, M.D.Emergency Medicine Physician1912134552
- Sandra Pineros, PA-CPhysician Assistant1225220163
Verify Marc Massey in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 57099Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
49% fewer Medicare Part D claims than the average physician assistant in 2024
428 Medicare Part D claims for 224 beneficiaries, against an average of 832 among the 95,030 providers of this specialty who prescribed in Part D.
Most prescribed
- Albuterol Sulfate Hfa92 claims
- Prednisone60 claims
- Amoxicillin29 claims
- Sulfamethoxazole-Trimethoprim22 claims
- Ibuprofen19 claims
- Nitrofurantoin Mono-Macro16 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.
The Medicare quality score for 2023: 96.5 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
5 physician assistant records list a San Bruno practice address
They are 5 of the 1,579 NPPES records with a San Bruno practice address, and 13,861 physician assistant records in California.
All 5 in San Bruno → All 13,861 in California → Every provider in San Bruno →
Other physician assistant records in California
- Marcia -Galbraith, PAStockton, CA1407143274
- Danny Abad, PAOrange, CA1477158673
- Lea Dominique Abadies, PATustin, CA1124754254
- Rea Elizabeth Abaniel, P.A.-CSeal Beach, CA1396173621
- Ramina Abbasi, PA-CSignal Hill, CA1093448300
- Ariel Abbott, PA-CStockton, CA1780334342
- Barrie Abbott, PA-CAnza, CA1861602575
- Elizabeth Abbott, PA-CSan Diego, CA1437540762
- Angela Abboud, MMS, PA-CSanta Rosa, CA1114399334
- Fatimeh Abdallah, P.A.-CNewport Beach, CA1487002218
Common questions
What is Marc Massey, PA-C's NPI number?
Marc Massey, PA-C's National Provider Identifier (NPI) is 1649680364, issued on May 2, 2014. An NPI identifies a provider in billing; it is not a license.
Where is Marc Massey, PA-C located?
The NPPES record lists a practice address at 1310 EL Camino Real Ste J, San Bruno, CA, 94066. Phone: (650) 270-2395. Providers update this record themselves, so call before visiting.
How can I verify Marc Massey, PA-C's license?
NPPES lists California license number 57099, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Marc Massey, PA-C prescribe under Medicare Part D?
In 2024, Marc Massey, PA-C had 428 Medicare Part D claims for 224 beneficiaries; the average among physician assistant prescribers was 832. Part D covers Medicare prescriptions only.
What is Marc Massey, PA-C's Medicare quality score?
The 2023 MIPS final score is 96.5 of 100. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.