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

Dr. John K Berk, DDS

Individual provider General Practice Dentistry · NPI 1770507675

Dr. John K Berk, DDS is a General Practice Dentistry in Castro Valley, California. Licensed in California. Registered with an NPI since 2006.

Licensed in
CA
In the registry since
2006
What do these letters mean?
DDS — Doctor of Dental Surgery
A dentist. DDS and DMD are the same qualification — universities choose which title to award.

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Practice location Address checks out

20652 Redwood Rd
Castro Valley, CA 94546-5622
Phone: (510) 733-6282
Fax: (510) 733-6304
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

General Practice Dentistry (primary) Taxonomy 1223G0001X · Licence 21540 (CA)

Record details

NPI number1770507675
Entity typeIndividual (Type 1)
GenderMale
Credentials DDS
Sole proprietorNo
NPI enumeratedJuly 26, 2006
Last updated in NPPESJuly 8, 2007
Mailing address20652 Redwood Rd, Castro Valley, CA 94546-5622

Other providers in Castro Valley