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DOUGLAS D. ZHANG, M.D. INC
NPI 1336215649
Family Medicine in San Leandro, CA

Active since November 28, 2006
13851 E 14TH ST STE 102, SAN LEANDRO, CA 94578(510) 351-2100(510) 357-3389 Get Directions Write a Review

NPPES record last updated: March 23, 2011. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Douglas D. Zhang, M.d. Inc NPPES

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

DOUGLAS D. ZHANG, M.D. INC (NPI 1336215649) is a healthcare organization registered as a family medicine in San Leandro, California and active in the NPI registry since November 2006. The organization lists Doreen Fernandez, Business Department, as its authorized official.

NPPES Registry Identity

NPI1336215649
Entity TypeOrganization
Primary Taxonomy207Q00000X
Legal Business NameDOUGLAS D. ZHANG, M.D. INC
Location Address13851 E 14TH ST STE 102San Leandro, CA 94578-2628
Mailing Address13851 E 14th St Ste 102San Leandro, CA 94578-2628 · (510) 351-2100 · Fax (510) 357-3389
Phone(510) 351-2100
Fax(510) 357-3389
Organization SubpartNo
Authorized OfficialDoreen FernandezBusiness Department · (510) 351-2100
Enumeration DateNovember 28, 2006
Last NPPES UpdateMarch 23, 2011
✔ NPI 1336215649 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyFamily MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207Q00000X
Definition
Family Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadth which integrates the biological, clinical, and behavioral sciences. The scope of family medicine is not limited by age, sex, organ system, or disease entity.
13851 E 14TH ST STE 102, San Leandro, CA 94578
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Other Identifiers 2

Medicare UPING86907CA
Medicare ID-Type Unspecified00A632000CA

Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Douglas D. Zhang, M.d. Inc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

Medicare enrollment records show 1 clinician reassigns Medicare billing to Douglas D. Zhang, M.D. Inc, which bills Medicare for the services this clinician delivers.

Clinician (1)

Douglas Zhang, M.D.
General Practice
NPI 1023074341
13851 E 14TH ST
San Leandro, CA 94578
(510) 351-2100
✔ PECOS✔ Accepts MedicareSame address

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

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 Douglas D. Zhang, M.D. Inc's NPI number?

The NPI number for Douglas D. Zhang, M.D. Inc is 1336215649. It was assigned to this organization in the NPPES registry on November 28, 2006.

Where is Douglas D. Zhang, M.D. Inc located?

Douglas D. Zhang, M.D. Inc is located at 13851 E 14th St Ste 102, San Leandro, CA 94578. The listed phone number is (510) 351-2100.

What is Douglas D. Zhang, M.D. Inc's specialty?

The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.

Is Douglas D. Zhang, M.D. Inc enrolled in Medicare?

Yes. Douglas D. Zhang, M.D. Inc is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Douglas D. Zhang, M.D. Inc?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (General Practice) reassigns their Medicare billing to Douglas D. Zhang, M.D. Inc. A reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for the clinician's services. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for Douglas D. Zhang, M.D. Inc was last updated on March 23, 2011. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.