Rosemary S. Castillo, NP
Nurse Practitioner · Glendora, CA
Rosemary S. Castillo, NP is a nurse practitioner with a practice address in Glendora, California, and NPI 1891854519, issued on Dec 8, 2006. Check the license (California NP6156, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Rosemary S. Castillo
- Credential
- NP
- Primary taxonomy
- Nurse Practitioner 363L00000X
- License number
- NP6156 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2025 E Route 66, Glendora, CA 91740
- Phone
- (626) 335-4610
- Enumerated
- Dec 8, 2006
- Record last updated
- Dec 7, 2025
- Medicare enrollment
- Enrolled (PECOS I20100210000575); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
Also registered at 2025 E Route 66
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Patrick Joseph Alix, MDHospice and Palliative Medicine (Internal Medicine) Physician1457352783
- Virginia Barrett, M.D.Internal Medicine Physician1750474557
- Jovi CacnioPediatrics Physician1407821275
- Florence Cappleman, MDFamily Medicine Physician1073725297
- Ihsan Hakimeh, MDInternal Medicine Physician1407805153
- Lisa Kimpark, M.D.Pediatrics Physician1144312505
Verify Rosemary S. Castillo in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license NP6156Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
52% fewer Medicare Part D claims than the average nurse practitioner in 2024
532 Medicare Part D claims for 265 beneficiaries, against an average of 1,109 among the 54,319 providers of this specialty who prescribed in Part D. 18 claims were for opioids.
Most prescribed
- Amlodipine Besylate27 claims
- Eliquis27 claims
- Omeprazole24 claims
- Levothyroxine Sodium21 claims
- Ibuprofen16 claims
- Metformin Hcl15 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $1,017.94
8 payments; by number, the most common kind was food and beverage; the largest payer was Teva Pharmaceuticals USA, Inc. The 38,884 providers of this specialty with any payment received $791.64 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Healthcare Partners Affiliates Medical GroupGlendora, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
12 nurse practitioner records list a practice address in Glendora
They are 12 of the 921 NPPES records with a practice address in Glendora, and 8,223 nurse practitioner records in California.
All 12 in Glendora → All 8,223 in California → Every provider in Glendora →
Other nurse practitioner records in California
- Barbara Aaronson, RN/NURSE PRACTITONERLos Angeles, CA1588988182
- Albert Aba, AGNPSan Francisco, CA1578353777
- Martha Ababneh, CNAEl Monte, CA1275118614
- Maria Katrina Abad, AGPCNP-BCSan Carlos, CA1306394952
- Shayda Abadi, NPPalo Alto, CA1316745540
- Jessika Abarca, NPSan Fernando, CA1972263945
- Hangama Abassi, N.P.Walnut Creek, CA1487083655
- Elizabeth Abaunza, NPSan Francisco, CA1962044347
- Honeylynn Abaya, NPMoreno Valley, CA1528799145
- Tara Abbondanza, NPArcadia, CA1730355173
Common questions
What is Rosemary S. Castillo, NP's NPI number?
Rosemary S. Castillo, NP's National Provider Identifier (NPI) is 1891854519, issued on Dec 8, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Rosemary S. Castillo, NP located?
The NPPES record lists a practice address at 2025 E Route 66, Glendora, CA, 91740. Phone: (626) 335-4610. Providers update this record themselves, so call before visiting.
How can I verify Rosemary S. Castillo, NP's license?
NPPES lists California license number NP6156, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Rosemary S. Castillo, NP prescribe under Medicare Part D?
In 2024, Rosemary S. Castillo, NP had 532 Medicare Part D claims for 265 beneficiaries; the average among nurse practitioner prescribers was 1,109. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.