Gastroenterology Services
Gastroenterology • Richmond, CA • Multiple (Berkeley Outpatient Center; Concord Medical Center; San Ramon Regional Medical Center; Walnut Creek Medical Center) locations
Information from public sources; not independently verified. Confirm hours, insurance and appointment availability with the clinic.
Last gathered July 10, 2026. How our information is sourced · Report incorrect information
About
Gastroenterology Services at John Muir Health operates at four locations across the Bay Area: Berkeley, Concord, San Ramon, and Walnut Creek, California. The service provides general gastroenterology, advanced endoscopy, colorectal screening, and treatment for conditions including GERD, inflammatory bowel disease, hemorrhoids, diverticulitis, and liver disorders. The team accepts most major health insurance plans, including HMOs, PPOs, and Medicare.
Services Offered
Technology & Equipment
Insurance & Payment
Insurance plans accepted in Contra Costa County and at Berkeley Outpatient Center, Concord Medical Center, San Ramon Regional Medical Center, Walnut Creek Medical Center
Most major health insurance plans, including HMOs, PPOs, and Medicare.
Languages Spoken
FAQs
What services are offered by Gastroenterology at John Muir Health?
Gastroenterology services including general gastroenterology, advanced endoscopy, colorectal screening, diverticulitis, hemorrhoids, GERD/acid reflux, inflammatory bowel disease, hepatology/liver disorders.
What insurances do you accept?
We accept most major health insurance plans, including HMO's, PPO's, and Medicare.
Where are the locations and contact numbers?
Berkeley Outpatient Center 3100 San Pablo Avenue, Berkeley, CA 94702 (510) 985-5200; Concord Medical Center 2540 East St., Concord, CA 94520 (925) 682-8200; San Ramon Regional Medical Center 6001 Norris Canyon Road, San Ramon, CA 94583 (925) 275-9200; Walnut Creek Medical Center Advanced procedures available 1601 Ygnacio Valley Rd., Walnut Creek, CA 94598 (925) 939-3000.
How do I schedule an appointment?
To schedule an appointment please obtain a referral from your Primary Care Provider. If you do not have a Primary Care Provider, visit our Find A Doctor directory to select one.
Who can I contact with questions about my condition?
Call our Nurse Navigator for questions about your condition and how we can help at (925) 296-7340.
Awards & Accreditations
Social Media
Photos
Photos published by Gastroenterology Services showing the gastroenterology practice in Richmond, CA.
What Patients Say
Overall sentiment across review platforms: mixed
- Richmond Gastroenterology Associates (Birdeye): 4.7/5 (88 reviews)
- Richmond Gastroenterology Associates (WebMD practice page): 4/5 (4 reviews)
- Richmond Gastroenterology Associates (Yelp brand page): 2.1/5 (48 reviews)
- Dr. Michael Farrell (Healthgrades): 4.2/5 (158 reviews)
- Dr. Puneet Kumar (Healthgrades): 3.6/5 (73 reviews)
- Dr. Andy Thanjan (Healthgrades): N/A star rating shown; recommendation likelihood 4.779/5 (181 ratings)
- Dr. Alex R. Seamon (Vitals): N/A (summary of feedback; no numeric rating shown in snippet) (N/A (not shown in snippet))
- Dr. Andy Thanjan (WebMD): N/A (text summary of praises; no numeric rating shown in snippet) (N/A (not shown in snippet))
Patients praise
- Generally positive experiences with care and communication at Richmond Gastroenterology Associates/testimonials
- Caring, knowledgeable doctors and staff; thorough explanations and patients not feeling rushed (examples: Dr. Thanjan, Dr. Seamon)
- Efficient/professional procedures and supportive staff noted in some reviews/testimonials
Common complaints
- Poor patient communication (no call backs/responding, lack of responses)
- Billing/insurance billing disputes or unexpected charges
- Scheduling and access issues (difficulty getting appointments, delays/rescheduling without notice)
- Perceived rushed/assembly-line colonoscopy workflow and inadequate responsiveness/management follow-up
- Wait times and limited time with doctor in some reviews
"“Avoid business with them… they do not respond or answer phone or text.”"
- WebMD practice page (Richmond Gastroenterology Associates)"“After having the procedure done, I was billed over $800 because now they say that it wasn’t routine.”"
- WebMD practice page (Richmond Gastroenterology Associates)"“This practice is an assembly line of colonoscopies.”"
- Birdeye reviews (Richmond Gastroenterology Associates)Synthesized from public review platforms as of Jul 10, 2026 - sources: [1][2][3][4].
In the News
- Sarah W W. Sherman - Nurse Practitioner in North Chesterfield, VA - May 14, 2026
- Elizabeth Dunne, PA - Physician Assistant in North Chesterfield, VA - May 14, 2026
- Lauren H. Cox, PA - Physician Assistant in Richmond, VA - May 14, 2026
- Levi J. Bauer, PA - Physician Assistant in Richmond, VA - May 14, 2026
- Frank DiPaola, MD | Pediatric GI & Liver Specialist - Nov 22, 2025
Information sourced from the clinic's website as of July 10, 2026.
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