Karla Castro, FNP
NPI 1922513050 · Nurse Practitioner · Walnut Creek, CA
Karla Castro, FNP is a Nurse Practitioner provider in Walnut Creek, CA (NPI 1922513050).
Provider details
- NPI number
- 1922513050
- Entity type
- Individual
- Primary specialty
- Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- FNP
- Sex
- Female
- Sole proprietor
- No
- License
- 95008130 (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
8 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 documented practice locations
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
Additional practice locations (1)
- 2500 Alhambra AveMartinez, CA 94553-3156Phone: (925) 890-6433
Registry dates
- Enumerated
- 2017-12-12
- Last updated
- 2018-03-17
Frequently asked questions
- What is Karla Castro's NPI number?
- Karla Castro's National Provider Identifier (NPI) is 1922513050, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Karla Castro's specialty?
- Karla Castro is listed in the NPPES registry with a primary specialty of Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Karla Castro located?
- Karla Castro's practice location on file with NPPES is 1981 N Broadway Ste 200, Walnut Creek, CA 94596-3872.
- What is Karla Castro's phone number?
- The practice phone number listed in the NPPES registry for Karla Castro is (925) 287-8777.
- Is Karla Castro's NPI active?
- Yes — Karla Castro's NPI (1922513050) is active in the NPPES registry as of the last update on 2018-03-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.