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

Brian Zwahlen, DDS

General Practice Dentistry in Modesto, CA · enumerated 2007 · practices at Brady S. Marshall Dmd Inc.

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

National Provider Identifier

1447384102

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Registry record

Entity type Individual (Type 1)
Name Brian Zwahlen
Credential DDS
Sex Male
Practice address Modesto, CA, 95350
Phone (209) 522-5102
Fax (209) 522-1051
Enumeration date Mar 15, 2007
Last updated in NPPES Jul 8, 2007

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

Taxonomy & licenses

1223G0001X General Practice Dentistry Dental Providers · License 47683 (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.

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Frequently asked questions

What is the NPI number for Brian Zwahlen?
The National Provider Identifier (NPI) for Brian Zwahlen is 1447384102, a Type 1 (individual) record in the CMS NPPES registry.
Where does Brian Zwahlen practice?
The practice location on file with NPPES is in Modesto, CA. Providers can have multiple locations; NPPES lists the primary practice address.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.