Healthcare Providers & Facilities in Greenbrae, CA
Public healthcare directory of 731 individual practitioners and 114 healthcare facilities located in Greenbrae, California.
Medical Specialties in Greenbrae
Select a specialty to view practitioner listings, practice locations, and qualifications.
Anesthesiology
Obstetrics & Gynecology
Internal Medicine
Physician Assistant
All Specialties in Greenbrae
Specialties with enough public records for a comparison with U.S. figures, plus the 60 largest of 124 more with at least one listed practitioner. Number of practitioners in brackets.
Allopathic & Osteopathic Physicians
- Anesthesiology - Critical Care Medicine (3)
- Dermatology (3)
- Emergency Medicine (12)
- Family Medicine (5)
- General Practice (8)
- Hospitalist (3)
- Internal Medicine - Endocrinology, Diabetes & Metabolism (8)
- Internal Medicine - Gastroenterology (8)
- Internal Medicine - Geriatric Medicine (3)
- Internal Medicine - Infectious Disease (3)
- Obstetrics & Gynecology - Gynecology (4)
- Ophthalmology (4)
- Orthopaedic Surgery (3)
- Otolaryngology (5)
- Pathology - Anatomic Pathology & Clinical Pathology (10)
- Pediatrics (19)
- Plastic Surgery (5)
- Psychiatry & Neurology - Psychiatry (18)
- Radiology - Diagnostic Radiology (13)
- Radiology - Radiation Oncology (4)
- Surgery (4)
- Surgery - Vascular Surgery (3)
- Urology (7)
Behavioral Health & Social Service Providers
Dental Providers
Dietary & Nutritional Service Providers
Nursing Service Providers
Nursing Service Related Providers
Other Service Providers
- Acupuncturist (3)
- Case Manager/Care Coordinator (3)
- Community Health Worker (3)
- Midwife (3)
- Peer Specialist (7)
- Specialist (9)
Pharmacy Service Providers
- Pharmacist (24)
Physician Assistants & Advanced Practice Nursing Providers
Respiratory, Developmental, Rehabilitative and Restorative Service Providers
- Occupational Therapist (12)
- Physical Therapist (10)
Speech, Language and Hearing Service Providers
Student, Health Care
Technologists, Technicians & Other Technical Service Providers
- Perfusionist (3)
Featured Healthcare Providers in Greenbrae
Practitioner profiles in Greenbrae, CA with recent CMS Medicare or Open Payments data.
Dr. Ehab Sorial , MD
Surgery - Vascular Surgery
Dr. Marc Schwartz , MD
Psychiatry & Neurology - Psychiatry
Dr. Joseph Poen , MD
Radiology - Radiation Oncology
Dr. Romeo Agbayani , MD
Otolaryngology
Dr. Marisela Noorhasan , MD
Internal Medicine - Endocrinology, Diabetes & Metabolism
Dr. Warda Zaman , DO
Internal Medicine - Nephrology
Largest Cities in California
Other California cities with a full directory, by the number of active practitioners listed in NPPES.
How Greenbrae compares with the U.S.
731 active clinicians list a practice address in Greenbrae, CA in the NPI registry.
Population data for this city are not available, so we do not compare it with the U.S. rate.
70% of clinicians in Greenbrae listed in the CMS Medicare file (152 of 216) accept Medicare assignment. That is lower than the California share of 91%.
Only 216 of 731 active clinicians in Greenbrae appear in the CMS Medicare file, so this share describes that smaller group.
What is Medicare assignment?
A clinician who accepts Medicare assignment agrees to take the Medicare-approved amount as full payment for services that Original Medicare covers. You usually still pay your deductible and coinsurance. This comes from the CMS Doctors and Clinicians file and applies to Original Medicare only. Medicare Advantage plans have their own provider networks. It does not show whether a clinician is taking new patients.
Some clinicians are listed as "may accept assignment," which means they can decide case by case. Clinicians without an assignment flag, or who are not in the CMS file, are not counted as accepting assignment. That does not mean they refuse Medicare. Ask the office before your visit.
36% of clinicians in Greenbrae listed in the CMS Medicare file (78 of 216) have a CMS telehealth indicator, meaning their recent Medicare claims include telehealth services. That is higher than the California share of 28%.
About the telehealth indicator
The telehealth indicator comes from CMS. It marks clinicians whose recent paid Medicare claims include services delivered by telehealth. It means a clinician has provided some services by telehealth, not that every visit can be done online. A clinician without the indicator may still offer telehealth, for example to patients who are not on Medicare. Ask the office which visits can be done by video or phone.
These figures summarize public federal data. They do not measure quality of care, appointment availability, or whether a clinician accepts your insurance or new patients. Registry addresses can be out of date. Please confirm details directly with the office and your plan. This information is not medical advice.
Prepared by T-MedInfo from NPPES, CMS and U.S. Census Bureau data. Questions or corrections: support@true-medinfo.com · Methodology
Sources: Clinician counts and practice addresses: NPPES NPI Registry, Centers for Medicare & Medicaid Services (CMS), data as of August 2026. Medicare assignment and telehealth indicators: CMS Doctors and Clinicians National Downloadable File.
Greenbrae CMS Healthcare & Financial Disclosures
CMS Part D Prescribers (2024), Open Payments (program year 2025), Medicare (PECOS) enrollment and Part B (2024) data for Greenbrae, CA
Healthcare operations in Greenbrae, CA encompass 731 active individual practitioners and 114 registered medical facilities across 128 clinical specialties.
According to CMS Medicare Part D analytics for 2024, prescription drug volume in Greenbrae accounts for $26.8 Million across 108,365 prescription claims. 316 local practitioners have a Medicare (PECOS) enrollment record. Open Payments data for program year 2025 list $0.3 Million in payments reported by companies to 144 local practitioners; a reported payment does not necessarily mean the financial relationship is improper.