Hillary Koster, MS
NPI 1851475032 · Psychologist · San Francisco, CA
Hillary Koster, MS is a Psychologist provider in San Francisco, CA (NPI 1851475032).
Provider details
- NPI number
- 1851475032
- Entity type
- Individual
- Primary specialty
- PsychologistBehavioral Health & Social Service Providers
- Credential
- MS
- Sex
- Female
- Sole proprietor
- No
- License
- MFC32149 (CA)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Behavioral Health & Social Service 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
- 2006-10-25
- Last updated
- 2025-09-11
Frequently asked questions
- What is Hillary Koster's NPI number?
- Hillary Koster's National Provider Identifier (NPI) is 1851475032, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Hillary Koster's specialty?
- Hillary Koster is listed in the NPPES registry with a primary specialty of Psychologist (Behavioral Health & Social Service Providers).
- Where is Hillary Koster located?
- Hillary Koster's practice location on file with NPPES is 2120 Market Street, San Francisco, CA 94114-1375.
- What is Hillary Koster's phone number?
- The practice phone number listed in the NPPES registry for Hillary Koster is (415) 810-5572.
- Is Hillary Koster's NPI active?
- Yes — Hillary Koster's NPI (1851475032) is active in the NPPES registry as of the last update on 2025-09-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.