Ann Williamson Walgenbach, RN, FNP, MSN, RNFA
Family Nurse Practitioner · San Francisco, CA
Ann Williamson Walgenbach, RN, FNP, MSN, RNFA is a family nurse practitioner with a practice address in San Francisco, California, and NPI 1376618249, issued on Nov 23, 2006. Check the license (California 319640, as entered in NPPES) with the California board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Ann Williamson Walgenbach
- Credential
- RN, FNP, MSN, RNFA
- Primary taxonomy
- Family Nurse Practitioner 363LF0000X
- License number
- 319640 CA
Self-reported in NPPES; status is on the state search - Practice location
- 3727 Buchanan St Ste 300, San Francisco, CA 94123
- Phone
- (415) 563-3110
- Enumerated
- Nov 23, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (415) 563-3301
- Entity
- Type 1 · individual
8 nearest family nurse practitioner records → All 16,966 in California → Look up another NPI →
Also registered at 3727 Buchanan St Ste 300
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Ann Williamson Walgenbach in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 319640Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Ann Williamson Walgenbach among 16,966 family nurse practitioner records in California
Ann Williamson Walgenbach, RN, FNP, MSN, RNFA is one of 16,966 family nurse practitioner records with a practice address in California. 67% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2006, is newer than 1% of them.
- NPI issued2006 · 1% of these records are older, 93% newer
- In a Medicare fileNo · 67% of these records are
- In the CMS Doctors and Clinicians fileNo · 40% of these records are
- Record last updated2007 · 42% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LF0000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
662 family nurse practitioner records list a practice address in San Francisco
They are 662 of the 38,143 NPPES records with a practice address in San Francisco, and 16,966 family nurse practitioner records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 16,966 in California → Every provider in San Francisco → Family Nurse Practitioner nationwide →
The 8 family nurse practitioner records with the nearest ZIP codes
- Victoria Arambula, FNPSan Francisco, CA 941231134046956
- Ahna EconomidisSan Francisco, CA 941231881881076
- Aileen McAllister, NPSan Francisco, CA 941231144000472
- Rachel Mills, NPSan Francisco, CA 941231831805613
- Kristen Peek, NPSan Francisco, CA 941231932481686
- Stephani Ramirez, NP-CSan Francisco, CA 941231447855051
- Elsa Acosta Sullivan, FNPSan Francisco, CA 941231720658313
- Elena Todorova, NPSan Francisco, CA 941231992939557
Common questions
What is Ann Williamson Walgenbach, RN, FNP, MSN, RNFA's NPI number?
Ann Williamson Walgenbach, RN, FNP, MSN, RNFA's National Provider Identifier (NPI) is 1376618249, issued on Nov 23, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Ann Williamson Walgenbach, RN, FNP, MSN, RNFA located?
The NPPES record lists a practice address at 3727 Buchanan St Ste 300, San Francisco, CA, 94123. Phone: (415) 563-3110. Providers update this record themselves, so call before visiting.
How can I verify Ann Williamson Walgenbach, RN, FNP, MSN, RNFA's license?
NPPES lists California license number 319640, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.