Gastroenterology Specialists in Fairfield, CA
Gastroenterology • Fairfield, CA
About
NorthBay Gastroenterology in Fairfield, CA offers gastroenterology services including medications, minimally invasive endoscopic procedures, and complex digestive endoscopy. The practice is staffed by board-certified gastroenterologists and advanced health practitioners.
Clinic Type
Gastroenterology
Address
Fairfield, CA
Phone
(707) 646-3555
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Opening Hours
Not published — contact the clinic to confirm hours.
Services Offered
Team
Insurance & Payment
Languages Spoken
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Social Media
Photos
What Patients Say
Overall sentiment across review platforms: positive
- Healthgrades (Dr. Michael Krier): 5.0 out of 5 (53 ratings) (53 ratings)
- Healthgrades (Dr. Rashid Iqbal): 3.9 out of 5 (31 ratings) (31 ratings)
- NorthBay Health (Dr. Michael Krier): 4.9 out of 5 (170 ratings) (170 ratings)
- NorthBay Health (Dr. Mounzer Al Samman): 4.8 out of 5 (155 ratings) (155 ratings)
Patients praise
- High levels of patient satisfaction with clinical care
- Doctors described as compassionate, thorough, and knowledgeable
- Effective communication and explanation of conditions and treatments
- Positive experiences with procedures such as colonoscopies and endoscopies
Common complaints
- Some patient dissatisfaction with office staff and billing in isolated reviews
"I could not recommend this Dr. He really cares about his patients. Takes time and really follows through. I have had GI problems for years and finally have some hope for help."
— Healthgrades (Dr. Michael Krier)"Dr. Iqbal manages my Crohn's Disease. He is caring, compassionate, thorough, knowledgeable and experience. He explains symptoms, physical conditions, and explains possible treatment options. Excellent physician with a great office staff."
— Healthgrades (Dr. Rashid Iqbal)"After an initial consult, Dr. Krier performed an endoscopy and colonoscopy on me. No side effects. Felt great. Report was thorough and easily understood."
— WebMD (Dr. Michael Krier)Synthesized from public review platforms as of Jul 10, 2026 — sources: [1][2][3][4].
In the News
Information sourced from the clinic's website as of July 10, 2026.
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