Margaret Wallhagen, RN, GNP, PHD
NPI 1245331222 · Gerontology Nurse Practitioner · San Francisco, CA
Margaret Wallhagen, RN, GNP, PHD is a Gerontology Nurse Practitioner provider in San Francisco, CA (NPI 1245331222).
Provider details
- NPI number
- 1245331222
- Entity type
- Individual
- Primary specialty
- Gerontology Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- RN, GNP, PHD
- Sex
- Female
- Sole proprietor
- No
- License
- 181577 (CA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-09-25
- Last updated
- 2007-07-08
Frequently asked questions
- What is Margaret Wallhagen's NPI number?
- Margaret Wallhagen's National Provider Identifier (NPI) is 1245331222, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Margaret Wallhagen's specialty?
- Margaret Wallhagen is listed in the NPPES registry with a primary specialty of Gerontology Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Margaret Wallhagen located?
- Margaret Wallhagen's practice location on file with NPPES is 2 Koret Way, San Francisco, CA 94143-0610.
- What is Margaret Wallhagen's phone number?
- The practice phone number listed in the NPPES registry for Margaret Wallhagen is (415) 476-4965.
- Is Margaret Wallhagen's NPI active?
- Yes — Margaret Wallhagen's NPI (1245331222) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.