IndividualActive
Regina Castillo
NPI 1043038664 · Registered Nurse · Thousand Oaks, CA
Regina Castillo is a Registered Nurse provider in Thousand Oaks, CA (NPI 1043038664).
Provider details
- NPI number
- 1043038664
- Entity type
- Individual
- Primary specialty
- Registered NurseNursing Service Providers
- Sex
- Female
- Sole proprietor
- Yes
- License
- 776371 (CA)
Specialties & taxonomies
Nursing Service Providers
Profile Score
Established profile(56/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
1 yr 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
125 W Thousand Oaks Blvd Ste 500
Thousand Oaks, CA 91360-4462
Phone: (805) 777-3500
Street-level locationGet directions
Mailing address
4651 Adam Rd
Simi Valley, CA 93063-2429
Registry dates
- Enumerated
- 2024-10-02
- Last updated
- 2024-10-02
- Certified
- 2024-10-02
Frequently asked questions
- What is Regina Castillo's NPI number?
- Regina Castillo's National Provider Identifier (NPI) is 1043038664, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Regina Castillo's specialty?
- Regina Castillo is listed in the NPPES registry with a primary specialty of Registered Nurse (Nursing Service Providers).
- Where is Regina Castillo located?
- Regina Castillo's practice location on file with NPPES is 125 W Thousand Oaks Blvd Ste 500, Thousand Oaks, CA 91360-4462.
- What is Regina Castillo's phone number?
- The practice phone number listed in the NPPES registry for Regina Castillo is (805) 777-3500.
- Is Regina Castillo's NPI active?
- Yes — Regina Castillo's NPI (1043038664) is active in the NPPES registry as of the last update on 2024-10-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.