Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Mrs. Ann Williamson Walgenbach, RN, FNP, MSN, RNFA

Individual provider Family Nurse Practitioner · NPI 1376618249

Mrs. Ann Williamson Walgenbach, RN, FNP, MSN, RNFA is a Family Nurse Practitioner in San Francisco, California. Licensed in California. Registered with an NPI since 2006.

Licensed in
CA
In the registry since
2006
What do these letters mean?
RN — Registered Nurse
A licensed nurse who completed a nursing degree and passed the NCLEX-RN examination.
FNP — Family Nurse Practitioner
A nurse practitioner who treats patients of all ages, much like a family doctor.
MSN — Master of Science in Nursing
A graduate nursing degree, usually held alongside an advanced practice licence.

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Practice location Address checks out

3727 Buchanan St Ste 300
San Francisco, CA 94123-1779
Phone: (415) 563-3110
Fax: (415) 563-3301
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Family Nurse Practitioner (primary) Taxonomy 363LF0000X · Licence 319640 (CA)

Record details

NPI number1376618249
Entity typeIndividual (Type 1)
GenderFemale
Credentials RN , FNP , MSN , RNFA
Sole proprietorNo
NPI enumeratedNovember 23, 2006
Last updated in NPPESJuly 8, 2007

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