Robert Castillo, FNP-C
NPI 1588540629 · Family Nurse Practitioner · Azusa, CA
Robert Castillo, FNP-C is a Family Nurse Practitioner provider in Azusa, CA (NPI 1588540629).
Provider details
- NPI number
- 1588540629
- Entity type
- Individual
- Primary specialty
- Family Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- FNP-C
- Sex
- Male
- Sole proprietor
- Yes
- License
- 95037388 (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
Under 1 yr in 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
- 2025-08-13
- Last updated
- 2026-05-03
- Certified
- 2026-05-03
Frequently asked questions
- What is Robert Castillo's NPI number?
- Robert Castillo's National Provider Identifier (NPI) is 1588540629, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Robert Castillo's specialty?
- Robert Castillo is listed in the NPPES registry with a primary specialty of Family Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Robert Castillo located?
- Robert Castillo's practice location on file with NPPES is 150 N Azusa Ave, Azusa, CA 91702-3521.
- What is Robert Castillo's phone number?
- The practice phone number listed in the NPPES registry for Robert Castillo is (626) 969-7885.
- Is Robert Castillo's NPI active?
- Yes — Robert Castillo's NPI (1588540629) is active in the NPPES registry as of the last update on 2026-05-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.