MarinHealth Primary Care in Sonoma, CA | A UCSF Health Clinic
Internal Medicine • Sonoma, CA • Since 1952 • Multiple locations throughout the North Bay locations
About
MarinHealth is a nonprofit health system based in Greenbrae, CA, serving Marin County and surrounding areas. Key points relevant to your query: - MarinHealth Medical Network: 125+ providers across 25 locations in the North Bay; practices are part of UCSF Health through a strategic alliance. - Primary care presence: The network includes primary care services across Marin, Sonoma, and Napa Counties, with offices aimed at convenient, comprehensive care. - UCSF affiliation: Through the MarinHealth–UCSF alliance, many MarinHealth primary care and specialty services align with UCSF Health, supporting referrals and coordinated care. - Location context: HQ and main medical center are in Greenbrae (250 Bon Air Road, Greenbrae, CA 94904); multiple offices across the North Bay region. If you’re specifically looking for a MarinHealth primary care clinic in Sonoma, CA under the UCSF Health umbrella, the network’s Sonoma locations and affiliated UCSF primary care providers would be the most relevant options to explore for care coordination and potential UCSF-affiliated services.
Clinic Type
Internal Medicine
Address
250 Bon Air Road, Greenbrae, CA 94904, US
Phone
415-514-6000
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Opening Hours
Not published — contact the clinic to confirm hours.
Telehealth
Available
Emergency Care
Dial 9-1-1 or go to the nearest Emergency Department for life-threatening emergencies.
Services Offered
Technology & Equipment
Team
Insurance & Payment
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Languages Spoken
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FAQs
What is a PCP?
A doctor who is in charge of your overall health and coordinates essential screenings and regular exams.
Do they offer telehealth?
Yes, telehealth appointments are offered.
How to schedule via MyChart?
Online scheduling is available in MarinHealth Primary Care clinics via the MyChart app.
What Patients Say
Overall sentiment across review platforms: mixed
- Yelp (MarinHealth Primary Care | A UCSF Health Clinic - Sonoma): Not provided in the search snippet (Not provided in the search snippet)
- Healthgrades (Dr. Brian Sebastian, MD - Internist): 4.5 Star Rating (51 reviews (39 with written review))
Patients praise
- Positive feedback about doctors and staff/service
- Positive feedback about physician being caring, knowledgeable, and not rushing patients
- Positive mentions of helpful, efficient staff (in the broader MarinHealth/UCSF network context shown in Yelp/MapQuest snippets)
Common complaints
- Negative experiences related to office/client service and responsiveness (e.g., difficulty reaching the office)
- Reported dissatisfaction with a provider/staff behavior in at least one review (severity expressed strongly)
- Issues mentioned around rescheduling and unhelpful personnel (Yelp/MapQuest snippets)
"Love the doctors and the staff. Highly recommend. Always provide great service and advice."
— Yelp — MarinHealth Primary Care | A UCSF Health Clinic (Sonoma)"As always, Dr. Sebastian was terrific. It's why I continue to have him as my primary care physician... I also appreciate that he is part of the UCSF system."
— Healthgrades — Dr. Brian Sebastian, MD (mentions MarinHealth/UCSF affiliation)"Dr Aldahhan is the absolute worst doctor. SHOULD BE DISBARRED!!! Does not care about patients..."
— MapQuest/Yelp-feed snippet page referencing MarinHealth Primary Care (Sonoma-related context)Synthesized from public review platforms as of Jul 10, 2026 — sources: [1][2][3][4].
In the News
- MarinHealth Medical Network Primary Care Provider Availability — Jun 29, 2026
- MarinHealth Primary Care | A UCSF Health Clinic — Jul 5, 2026
- Marinhealth Infectious Disease A UCSF Health Clinic - Healthgrades — Jan 9, 2026
- RN - Pediatrics in Sonoma at MarinHealth Primary Care A UCSF Health Clinic | Apply now! – StudySmarter – Talents
- Información sobre el Distrito Sanitario | Sonoma Valley Hospital
Information sourced from the clinic's website as of July 10, 2026.
More internal medicine clinics in Sonoma
Dr. Guy Delorefice, M.D. Inc. is a concierge/internal medicine primary care practice based in Sonoma, California. Key points: - Focus: Personalized internal medicine and primary care with concierge-style service for new/prospective patients. - Location: Sonoma, California (two office entries listed at 370 Perkins St, Sonoma 95476). - Practice details: Small, single-physician operation founded in 2007 with a hands-on, patient-focused approach. - Contact: Phone numbers (707) 938-2321 and (707) 938-1255; website drguysonoma.com. - Web presence: Moderate local footprint with a noted high bounce rate (0.4%) but low pages-per-visit (1.9); relies on QuickBooks for practice management. - Category fit: Healthcare, primary care, concierge physician services in Sonoma County. If you’re seeking top internal medicine/primary care near Sonoma, this practice offers a highly personalized, concierge model from a single physician. For comparison, consider other nearby internal medicine and primary care providers to evaluate range of services, appointment availability, and insurance coverage.
Sonoma Valley Hospital (Sonoma, CA) is a government healthcare district with 51 beds and 74 employees. It offers a broad range of services including preventive/wellness care, cardiopulmonary, women’s health, family practice, gastroenterology, general and orthopaedic surgery, internal medicine, cataract surgery, weight-loss, chronic/long-term and hospice care, skilled nursing, rehabilitation, and emergency services. The hospital opened its current facility in 1957 (origins dating to 1945) with expansions since the 1970s, and closed its obstetrics unit in 2018 due to declining births. Headquarters and main address: 347 Andrieux Street, Sonoma, CA 95476.
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