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

Dr. Joseph Grenn, DMD

Individual provider Endodontics · NPI 1245446509

Dr. Joseph Grenn, DMD is an Endodontics in San Francisco, California. Practices as a sole proprietor. Licensed in California.

Licensed in
CA
In the registry since
2007
What do these letters mean?
DMD — Doctor of Dental Medicine
A dentist. Identical training and licensing to a DDS.

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Practice location Address checks out

500 Spruce St
San Francisco, CA 94118-2648
Phone: (415) 221-2900
Fax: (415) 221-2950
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Endodontics (primary) Taxonomy 1223E0200X · Licence 22501 (CA)

Record details

NPI number1245446509
Entity typeIndividual (Type 1)
GenderMale
Credentials DMD
Sole proprietorYes
NPI enumeratedMay 15, 2007
Last updated in NPPESJuly 8, 2007
Mailing address32 Great Circle Drive, Mill Valley, CA 94941-3217

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