Karen Horn, NP
NPI 1164574331 · Adult Health Nurse Practitioner · San Leandro, CA
Karen Horn, NP is a Adult Health Nurse Practitioner provider in San Leandro, CA (NPI 1164574331).
Provider details
- NPI number
- 1164574331
- Entity type
- Individual
- Primary specialty
- Adult Health Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- NP
- Sex
- Female
- Sole proprietor
- No
- License
- RN297159 (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
- 2007-01-17
- Last updated
- 2009-11-24
Frequently asked questions
- What is Karen Horn's NPI number?
- Karen Horn's National Provider Identifier (NPI) is 1164574331, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Karen Horn's specialty?
- Karen Horn is listed in the NPPES registry with a primary specialty of Adult Health Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Karen Horn located?
- Karen Horn's practice location on file with NPPES is 2587 Merced St., San Leandro, CA 94577.
- What is Karen Horn's phone number?
- The practice phone number listed in the NPPES registry for Karen Horn is (510) 351-3553.
- Is Karen Horn's NPI active?
- Yes — Karen Horn's NPI (1164574331) is active in the NPPES registry as of the last update on 2009-11-24.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.