Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Douglas D. Zhang, MD Inc

Organization Family Medicine Physician · NPI 1336215649

Douglas D. Zhang, MD Inc provides Family Medicine Physician services in San Leandro, California. Registered with an NPI since 2006.

In the registry since
2006
What do these letters mean?
Inc — Incorporated
A form of business registration, not a clinical qualification.

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Practice location Address checks out

13851 E 14th St Ste 102
San Leandro, CA 94578-2628 Not confirmed with CMS for 15 years — call before visiting
Phone: (510) 351-2100
Fax: (510) 357-3389
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X

Record details

NPI number1336215649
Entity typeOrganization (Type 2)
Organization subpartNo
Authorized official Doreen Fernandez — Business Department · (510) 351-2100
NPI enumeratedNovember 28, 2006
Last updated in NPPESMarch 23, 2011
Mailing address13851 E 14th St Ste 102, San Leandro, CA 94578-2628

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