Rosemary Castillo, NP
NPI 1891854519 · Nurse Practitioner · Glendora, CA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Rosemary Castillo, NP is a Nurse Practitioner provider in Glendora, CA (NPI 1891854519).
Provider details
- NPI number
- 1891854519
- Entity type
- Individual
- Primary specialty
- Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- NP
- Sex
- Female
- Sole proprietor
- No
- License
- NP6156 (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 tenure33% of score
19 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
2 documented practice locations
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 14 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amlodipine Besylate | 27 | 12 |
| Apixabanbrand: Eliquis | 27 | 12 |
| Omeprazole | 24 | 13 |
| Levothyroxine Sodium | 21 | 12 |
| Ibuprofen | 16 | — |
| Metformin Hcl | 15 | — |
| Tamsulosin Hcl | 15 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,018 across 8 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (1)
- 9400 Rosecrans AveBellflower, CA 90706-2246Phone: (562) 461-3000
Registry dates
- Enumerated
- 2006-12-08
- Last updated
- 2025-12-07
- Certified
- 2025-12-07
Frequently asked questions
- What is Rosemary Castillo's NPI number?
- Rosemary Castillo's National Provider Identifier (NPI) is 1891854519, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Rosemary Castillo's specialty?
- Rosemary Castillo is listed in the NPPES registry with a primary specialty of Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Rosemary Castillo located?
- Rosemary Castillo's practice location on file with NPPES is 2025 E Route 66, Glendora, CA 91740-4670.
- What is Rosemary Castillo's phone number?
- The practice phone number listed in the NPPES registry for Rosemary Castillo is (626) 335-4610.
- Does Rosemary Castillo accept Medicare?
- Rosemary Castillo is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Rosemary Castillo's NPI active?
- Yes — Rosemary Castillo's NPI (1891854519) is active in the NPPES registry as of the last update on 2025-12-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.