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DR. JOSEPH GRENN D.M.D.
NPI 1245446509
Dentist - Endodontics in San Francisco, CA

Active since May 15, 2007
500 SPRUCE ST, SAN FRANCISCO, CA 94118(415) 221-2900(415) 221-2950 Get Directions Write a Review

NPPES record last updated: July 8, 2007. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Dr. Joseph Grenn D.m.d. NPPES

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

DR. JOSEPH GRENN D.M.D. (NPI 1245446509) is an individual endodontics provider in San Francisco, California, licensed in California (22501) and active in the NPI registry since May 2007.

NPPES Registry Identity

NPI1245446509
Entity TypeIndividualMale
Primary Taxonomy1223E0200X
Provider Legal NameDR. JOSEPH GRENNCredential: D.M.D.
Location Address500 SPRUCE STSan Francisco, CA 94118-2648
Mailing Address32 Great Circle DriveMill Valley, CA 94941-3217 · (415) 221-2900 · Fax (415) 221-2950
Phone(415) 221-2900
Fax(415) 221-2950
Sole ProprietorYes
Enumeration DateMay 15, 2007
Last NPPES UpdateJuly 8, 2007
✔ NPI 1245446509 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyDentist · EndodonticsDental Providers
Taxonomy Code1223E0200X
License✔ Licensed in CA · 22501
Definition
The branch of dentistry that is concerned with the morphology, physiology and pathology of the human dental pulp and periradicular tissues. Its study and practice encompass the basic and clinical sciences including biology of the normal pulp, the etiology, diagnosis, prevention and treatment of diseases and injuries of the pulp and associated periradicular conditions.
500 SPRUCE ST, San Francisco, CA 94118
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Other Providers at the Same Location NPPES 5

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

NEEMA BEHZAD MEHRKHODAVANDI DDS
Dentist (Endodontics)
500 SPRUCE ST, SUITE 204
SAN FRANCISCO, CA 94118
San Francisco County (415) 221-1788
DR. HAO TRAN DMD
Dentist (General Practice)
500 SPRUCE ST, SUITE #203
SAN FRANCISCO, CA 94118
San Francisco County (415) 752-5244
DR. RALAN DAI MING WONG
Dentist (Endodontics)
500 SPRUCE ST, STE #204
SAN FRANCISCO, CA 94118
San Francisco County (415) 221-1788
JASMINE ROXANNA FLAKE-WARMOTH DDS
Dentist
500 SPRUCE ST
SAN FRANCISCO, CA 94118
San Francisco County (415) 221-1788
DR. DIANE M HIURA DDS
Dentist
500 SPRUCE ST, SUITE 203
SAN FRANCISCO, CA 94118
San Francisco County (415) 752-5244

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 Joseph Grenn's NPI number?

The NPI number for Joseph Grenn is 1245446509. It was assigned to this individual provider in the NPPES registry on May 15, 2007.

Where is Joseph Grenn located?

Joseph Grenn practices at 500 Spruce St, San Francisco, CA 94118. The listed phone number is (415) 221-2900.

What is Joseph Grenn's specialty?

The primary specialty registered for this NPI is Dentist, specializing in Endodontics, with taxonomy code 1223E0200X.

When was this NPI record last updated?

The NPPES record for Joseph Grenn was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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.