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Mrs. Ann Williamson Walgenbach, RN, FNP, MSN, RNFA

Family Nurse Practitioner in San Francisco, CA · enumerated 2006.

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

National Provider Identifier

1376618249

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Registry record

Entity type Individual (Type 1)
Name Mrs. Ann Williamson Walgenbach
Credential RN, FNP, MSN, RNFA
Sex Female
Practice address 3727 Buchanan St Ste 300, San Francisco, CA, 94123
Phone (415) 563-3110
Fax (415) 563-3301
Enumeration date Nov 23, 2006
Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

363LF0000X Family Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 319640 (CA) Primary
RN · Registered Nurse: A nurse who completed an accredited nursing program and passed the NCLEX-RN licensure exam. About the RN 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

Where does Ann Walgenbach practice?
The practice location on file with NPPES is in San Francisco, CA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Ann Walgenbach?
The National Provider Identifier (NPI) for Ann Walgenbach is 1376618249, a Type 1 (individual) record in the CMS NPPES registry.

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