Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. Jeffrey Nebenzahl, DDS

General Practice Dentistry in Mill Valley, CA · enumerated 2006.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1821195843

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Registry record

Entity type Individual (Type 1)

Name Dr. Jeffrey Nebenzahl

Credential DDS

Sex Male

Practice address Mill Valley, CA, 94941

Phone (415) 383-0350

Enumeration date Sep 20, 2006

Last updated in NPPES Dec 20, 2009

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

1223G0001X General Practice Dentistry Dental Providers · License 36687 (CA) Primary

DDS · Doctor of Dental Surgery: A licensed dentist; DDS and DMD are equivalent dental degrees. About the DDS credential

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

Where does Jeffrey Nebenzahl practice?

The practice location on file with NPPES is in Mill Valley, CA. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Jeffrey Nebenzahl?

The National Provider Identifier (NPI) for Jeffrey Nebenzahl is 1821195843, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2009-12-20.