Mark Gillespie, P.A.
Physician Assistant · Greenbrae, CA
Mark Gillespie, P.A. is a physician assistant with a practice address in Greenbrae, California, and NPI 1609104835, issued on Nov 30, 2009. Check the license (California PA58005, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Mark Gillespie
- Credential
- P.A.
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- PA58005 CA
Self-reported in NPPES; status is on the state search - Practice location
- 250 Bon Air RD, Greenbrae, CA 94904
- Phone
- (415) 925-7000
- Enumerated
- Nov 30, 2009
- Record last updated
- May 29, 2026
- Fax
- (415) 925-7555
- Medicare enrollment
- Enrolled (PECOS I20201209003170); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 14,451 in California → Look up another NPI →
Also registered at 250 Bon Air RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Jory Adam, PA-CSurgical Physician Assistant1922269521
- Samuel Adams, MDHospitalist Physician1497785034
- Barbara Addleman, RNRegistered Nurse1053551267
- Linda Alexander, RNPsychiatric/Mental Health Registered Nurse1205589405
- Maxwell AlikinneyCounselor1538668728
Verify Mark Gillespie in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license PA58005Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
The practice group's MIPS final score for 2023 (Medicare payment program): 87.7 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. 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, group reporting; category weights for 2023 (qpp.cms.gov).
One hospital affiliation
- Cedars-Sinai Medical CenterWest Hollywood, CA · Acute Care Hospitals5 of 5 stars
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Mark Gillespie among 14,451 physician assistant records in California
Mark Gillespie, P.A. 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 2009, is newer than 25% of them.
- NPI issued2009 · 25% of these records are older, 73% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 50% of these records are
- Graduated2009 · median 2018 among the 7,214 with a school on file
- Record last updated2026 · 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).
18 physician assistant records list a practice address in Greenbrae
They are 18 of the 727 NPPES records with a practice address in Greenbrae, and 14,451 physician assistant records in California.
All 14,451 in California → Every provider in Greenbrae → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Courtney Cines, PA-CGreenbrae, CA 949041447758404
- Linda Clem, PAGreenbrae, CA 949041104899772
- Jessica Fedie, PA-CGreenbrae, CA 949041396179586
- April Gonzalez, PA-CKentfield, CA 949041366867954
- Brittany JangGreenbrae, CA 949041063972339
- Aram Katzman, PA-CKentfield, CA 949041609173442
- Marisol Martinez, PA-CGreenbrae, CA 949041386187623
- Shari Miller, PAGreenbrae, CA 949041912931296
Common questions
What is Mark Gillespie, P.A.'s NPI number?
Mark Gillespie, P.A.'s National Provider Identifier (NPI) is 1609104835, issued on Nov 30, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Mark Gillespie, P.A. located?
The NPPES record lists a practice address at 250 Bon Air RD, Greenbrae, CA, 94904. Phone: (415) 925-7000. Providers update this record themselves, so call before visiting.
How can I verify Mark Gillespie, P.A.'s license?
NPPES lists California license number PA58005, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
What is Mark Gillespie, P.A.'s MIPS final score?
The 2023 MIPS final score is 87.7 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.