Mark Gillespie , PA
Physician Assistant • Greenbrae, CA
Professional Overview & Biography Verified Profile Summary
Mark Gillespie, PA is a certified Physician Assistant practicing in Greenbrae, CA. With approximately 17 years of clinical experience since completing medical education in 2009, Mark Gillespie delivers high-quality medical care to the local community at 250 BON AIR RD.
Mark Gillespie is affiliated with Cedars-Sinai Medical Center and accepts Medicare assignment.
Frequently performed procedures and clinical services include critical care, first, critical care, insertion of artery tube for blood sampling or infusion through skin. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.
Practice Location & Contact Primary Location
250 Bon Air Rd
Greenbrae, CA 949041702
Medicare Profile & Education
Other
2009
✓ Accepts Assignment
In-Person Only
Specialty Benchmarks & Practice Insights
Comparative analytics for Physician Assistant in Greenbrae, CA
Practicing in Greenbrae, CA (14617 Statewide)
In-Person Office Visits Only
Under CMS Medicare Fee Schedule vs Standard Submitted Charges
Clinical Seniority & Experience Comparison
Performed Procedures & Service Volume
Top Medicare Part B procedures performed by this practitioner
| HCPCS Code & Description | Services | Patients | Submitted Charge | Medicare Allowed |
|---|---|---|---|---|
|
99291
Critical care, first 30-74 minutes
|
46 | 43 | $1527.78 | $197.63 |
Medical Specialties & State Licenses
CMS Verified: 2026-05-29NUCC Taxonomy Code: 363A00000X
A physician assistant is a person who has successfully completed an accredited education program for physician assistant, is licensed by the state and is practicing within the scope of that license. Physician assistants are formally trained to perform many of the routine, time-consuming tasks a physician can do. In some states, they may prescribe medications. They take medical histories, perform physical exams, order lab tests and x-rays, and give inoculations. Most states require that they work under the supervision of a physician.
Hospital & Practice Group Affiliations
Cedars-Sinai Medical Center
8700 Beverly Blvd, West Hollywood, CA 900481804
Phone: 3104235000
Practice Associates & Co-Workers
Healthcare professionals and specialists practicing at this location or sharing practice phone/fax
Advanced Practice Midwife
Certified Nurse Midwife
Emergency Medicine
Doctor of Medicine (M.D.)
Pharmacist
Registered Pharmacist
Emergency Medicine
Emergency Medicine
Doctor of Medicine (M.D.)
Social Worker - Clinical
Career & Practice History Timeline
Chronological log of verified NPI updates, location relocations, credentials, and registry changes
Registered at 250 BON AIR RD, GREENBRAE, CA 949041702 (Tel: 4159257000)
Registered at 250 BON AIR RD, GREENBRAE, CA 949041702 (Tel: 4159257000)
Physician Assistant (License #PA58005 in CA)
NPI status registered as active in NPPES database
Registered at 8900 VAN WYCK EXPY, EMERGENCY DEPARTMENT, JAMAICA, NY 114182832 (Tel: 7182066058)
Registered at 8900 VAN WYCK EXPY, EMERGENCY DEPARTMENT, JAMAICA, NY 114182832 (Tel: 5704415265)
Recorded as MARK GILLESPIE, P.A.
Physician Assistant (License #013468 in NY)
First registered as active Individual Practitioner in NPPES Database.
Patient & Community Reviews
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NPI Administrative Meta
Mailing Address
250 Bon Air Rd
Greenbrae, CA 949041702
Phone: 4159257000
This directory listing is for informational purposes only and does not constitute medical advice, diagnosis, or physician endorsement. If you are experiencing a medical emergency, please call 911 immediately.