Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Brian E Demuth MD A Professional

Specialist in Greenbrae, CA · enumerated 2007 · authorized official Brian Demuth, Physician.

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

National Provider Identifier

1669660205

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Registry record

Entity type Organization (Type 2)

Legal business name Brian E Demuth MD A Professional

Practice address 1000 S Eliseo Dr Ste 101, Greenbrae, CA, 94904

Phone (415) 464-0184

Fax (415) 464-0295

Enumeration date Oct 9, 2007

Last updated in NPPES Jan 29, 2008

Taxonomy & classification

174400000X Specialist Other Service Providers · License G602230 (CA) Primary

Authorized official

Name Brian Demuth

Title Physician

Phone (415) 464-0184

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

What type of organization is Brian E Demuth MD A Professional?

Brian E Demuth MD A Professional is registered in NPPES as a Specialist (its primary provider taxonomy).

What is a Type 2 NPI?

A Type 2 NPI identifies an organization (group practice, hospital, pharmacy, lab), while Type 1 NPIs identify individual providers. Organizations bill under their Type 2 NPI.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-01-29.