1. Home
  2. Directory
  3. California
  4. Antioch
  5. Internal Medicine
  6. NPI Profile

DENNIS ZAI MD
NPI 1740253350
Internal Medicine - Gastroenterology in Antioch, CA

Active since February 13, 2006
3903 LONE TREE WAY, SUITE 205, ANTIOCH, CA 94509(925) 754-8710(925) 754-0765 Get Directions Write a Review

NPPES record last updated: May 16, 2008. Verified against the NPPES registry weekly; last sync: July 26, 2026.

About Dennis Zai Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DENNIS ZAI MD (NPI 1740253350) is an individual gastroenterology provider in Antioch, California, licensed in California (G38299) and active in the NPI registry since February 2006.

NPPES Registry Identity

NPI1740253350
Entity TypeIndividualMale
Primary Taxonomy207RG0100X
Provider Legal NameDENNIS ZAICredential: MD
Location Address3903 LONE TREE WAY, SUITE 205Antioch, CA 94509-6249
Mailing Address3903 Lone Tree Way, Suite 205Antioch, CA 94509-6249 · (925) 754-8710 · Fax (925) 754-0765
Phone(925) 754-8710
Fax(925) 754-0765
Sole ProprietorYes
Enumeration DateFebruary 13, 2006
Last NPPES UpdateMay 16, 2008
✔ NPI 1740253350 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians
Taxonomy Code207RG0100X
License✔ Licensed in CA · G38299
Definition

An internist who specializes in diagnosis and treatment of diseases of the digestive organs including the stomach, bowels, liver and gallbladder. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and jaundice and performs complex diagnostic and therapeutic procedures using endoscopes to visualize internal organs.

3903 LONE TREE WAY, Antioch, CA 94509
Open in Google Maps ↗

Other Identifiers 3

Medicare PIN00G382990
Medicare UPINA47432
Medicaid00G38299CA

Other Providers at the Same Location NPPES 14

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DELTA PEDIATRICS MEDICAL GROUP, INC.
Preferred Provider Organization
3903 LONE TREE WAY, STE. 211
ANTIOCH, CA 94509
Contra Costa County (925) 754-7200
SUMNER SEIBERT M.D.
Orthopaedic Surgery
3903 LONE TREE WAY, SUITE 305
ANTIOCH, CA 94509
Contra Costa County (925) 754-5254
NAOKO IKEDA DO
Family Medicine
3903 LONE TREE WAY, 104
ANTIOCH, CA 94509
Contra Costa County (925) 755-1255
ALEX A. ASLAN, MD, INC
Internal Medicine (Gastroenterology)
3903 LONE TREE WAY, SUITE 205
ANTIOCH, CA 94509
Contra Costa County (925) 754-8710
SABRI E. SEN MD INC
Clinic/Center
3903 LONE TREE WAY, SUITE: 310
ANTIOCH, CA 94509
Contra Costa County (612) 812-4431
SABRI E. SEN, M.D., INC.
Urology
3903 LONE TREE WAY, SUITE 310
ANTIOCH, CA 94509
Contra Costa County (612) 812-4431
EAST BAY SURGICAL ASSOCIATES, A MEDICAL CORPORATION
Surgery
3903 LONE TREE WAY, SUITE 210
ANTIOCH, CA 94509
Contra Costa County (925) 757-0800
DR. LAUREN SHIRVANEE D.O.
General Practice
3903 LONE TREE WAY, SUITE 210
ANTIOCH, CA 94509
Contra Costa County (925) 754-7866

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Dennis Zai's NPI number?

The NPI number for Dennis Zai is 1740253350. It was assigned to this individual provider in the NPPES registry on February 13, 2006.

Where is Dennis Zai located?

Dennis Zai practices at 3903 Lone Tree Way Suite 205, Antioch, CA 94509. The listed phone number is (925) 754-8710.

What is Dennis Zai's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

When was this NPI record last updated?

The NPPES record for Dennis Zai was last updated on May 16, 2008. NPI Profile syncs with the weekly NPPES data releases published by CMS.