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Dr. Dennis Y Zai Is this you?

About Dr. Dennis Y Zai

Dr. Dennis Y Zai, MD is a Doctor primarily located in Antioch, CA. His specialties include Gastroenterology and Internal Medicine. Dr. Zai is affiliated with San Ramon Regional Medical Center and Sutter Delta Medical Center. He speaks English.

Rating Overview

3 Ratings with 1 Comment

The overall average patient rating of Dr. Dennis Y Zai is Great. Dr. Dennis Y Zai has been rated by 3 patients. From those 3 patients 1 of those left a comment along with their rating. The overall rating for Dr. Dennis Y Zai is 3.7 of 5.0 stars.

Mapbox Map of Dr. Dennis Y Zai

Primary Address

Bass Medical Group

3903 Lone Tree Way Ste 205
Antioch, CA 94509
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Dr. Dennis Y Zai has the following 2 specialties

  • Gastroenterology

    A gastroenterologist is a specialist in diagnosis and treatment of conditions involving the digestive/gastrointestinal (GI) tract. These doctors are experts on how food moves through the digestive system and is chemically broken down, with nutrients being absorbed and waste excreted. You might see this kind of doctor if you are experiencing any number of stomach issues, some of which might be severe diarrhea, irritable bowel syndrome, hemorrhoids, ulcers, acid reflux, Crohn's disease and more.

  • Internal Medicine

    An internist is a physician who focuses on the diagnosis and treatment of conditions that affect the adult population—both acute and chronic.
    These doctors are often who adults see as their primary physicians because they treat a broad range of illnesses that do not require surgical or specialist interventions. They also work to help a patient maintain optimal health in order to prevent the onset of disease.
    In addition to treating the common cold and flu, internists also treat chronic diseases like diabetes and heart disease.

  • Specialty Expertise

    Dr. Dennis Y Zai has the following 10 expertise

  • Hepatitis C
  • Ulcerative Colitis
  • Acid Reflux Disease (Gastroesophageal Reflux / GERD)
  • Irritable Bowel Syndrome (IBS)
  • Hemorrhoids
  • Acid Reflux Disease (GERD)
  • Constipation
  • Abdominal Pain
  • Celiac Disease
  • Colonoscopy


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He is a very experienced and dedicated physcian. I have had two colonoscopies with Dr. Zai. My colon was torturous and it was difficult for him to advance the tube and required a lot of physical manipulation on his part. Took 1 hour to advance the scope to where it needed to go. He was in a sweater afterwards. How many MDs would work this hard? He straightened me out thats for sure. Thanks Dr. Zai!

Full Review Rating Breakdown
One Star
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  • Hospital Affiliations

    Dr. Zai is affiliated (can practice and admit patients) with the following hospital(s).

  • Education

  • Illinois Masonic Medical Center


  • Accepted Insurance

    Dr. Dennis Y Zai accepts the following insurance providers.

  • Aetna
    • Aetna Choice POS II
    • Aetna HMO
    • Aetna HMO Deductible Plan CA only
    • Aetna Managed Choice POS Open Access
    • Aetna Signature Administrators PPO
  • Health Net
    • Health Net CA HMO Employer Group
    • Health Net CA Individual and Family PPO
    • Health Net CA PPO
  • UHC West
    • UHC West SignatureValue Alliance
    • UHC West SignatureValue HMO
  • United Healthcare
    • UHC Choice Plus POS
    • UHC Options PPO

Locations & Directions

Bass Medical Group, 3903 Lone Tree Way Ste 205, Antioch, CA
  • Similiar Doctors

    Dr. Dennis Y Zai is similar to the following 3 Doctors near Antioch, CA.