Reuben Arthur Castillo, M.D.
Student in an Organized Health Care Education/Training Program · Loma Linda, CA
Reuben Arthur Castillo, M.D. is a student in an organized health care education/training program with a practice address in Loma Linda, California, and NPI 1043539935, issued on May 18, 2010. Check the license with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Reuben Arthur Castillo
- Credential
- M.D.
- Primary taxonomy
- Student in an Organized Health Care Education/Training Program 390200000X
- Practice location
- 11234 Anderson St, Loma Linda, CA 92354
- Phone
- (559) 967-3896
- Enumerated
- May 18, 2010
- Record last updated
- May 18, 2010 (not updated in 16 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20130604000204); accepts Medicare assignment
- Medical or professional school
- University Of California, San Francisco School Of Medicine, 2010
- Entity
- Type 1 · individual
8 nearest student in an organized health care education/training program records → All 40,652 in California → Look up another NPI →
Also registered at 11234 Anderson St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Adina Achiriloaie, MDDiagnostic Neuroimaging (Radiology) Physician1992983282
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Verify Reuben Arthur Castillo in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this professionCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
35% fewer Medicare Part D claims than the average student in an organized health care education/training program in 2024
120 Medicare Part D claims for 91 beneficiaries, against an average of 185 among the 59,748 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims. 11 claims were for opioids.
Most prescribed
- Cephalexin27 claims
- Hydrocodone-Acetaminophen11 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 94.6 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Cep America - CaliforniaVisalia, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Reuben Arthur Castillo among 40,652 student in an organized health care education/training program records in California
Reuben Arthur Castillo, M.D. is one of 40,652 student in an organized health care education/training program records with a practice address in California. 16% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2010, is newer than 3% of them.
- NPI issued2010 · 3% of these records are older, 96% newer
- In a Medicare fileYes · 16% of these records are
- In the CMS Doctors and Clinicians fileYes · 6% of these records are
- Graduated2010 · median 2017 among the 2,409 with a school on file
- Record last updated2010 · 26% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 390200000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
1,059 student in an organized health care education/training program records list a practice address in Loma Linda
They are 1,059 of the 4,863 NPPES records with a practice address in Loma Linda, and 40,652 student in an organized health care education/training program records in California.
All 40,652 in California → Every provider in Loma Linda → Student in an Organized Health Care Education/Training Program nationwide →
The 8 student in an organized health care education/training program records with the nearest ZIP codes
- Krishna Ahuja, M.DLoma Linda, CA 923541487832416
- Eckardt CamposLoma Linda, CA 923541932315868
- Joe Casillas, MDLoma Linda, CA 923541366610396
- Gurinder Dhindsa, MDLoma Linda, CA 923541184832339
- Alexis Donneys, M.D.Loma Linda, CA 923541801093257
- Diah Douglas, M.D.Loma Linda, CA 923541689873770
- Guriqbal Gill, DMDLoma Linda, CA 923541538379375
- Ihab Megale, M.D.Loma Linda, CA 923541497969836
Common questions
What is Reuben Arthur Castillo, M.D.'s NPI number?
Reuben Arthur Castillo, M.D.'s National Provider Identifier (NPI) is 1043539935, issued on May 18, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Reuben Arthur Castillo, M.D. located?
The NPPES record lists a practice address at 11234 Anderson St, Loma Linda, CA, 92354. Phone: (559) 967-3896. Providers update this record themselves, so call before visiting.
How can I verify Reuben Arthur Castillo, M.D.'s license?
Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Reuben Arthur Castillo, M.D. prescribe under Medicare Part D?
In 2024, Reuben Arthur Castillo, M.D. had 120 Medicare Part D claims for 91 beneficiaries; the average among student in an organized health care education/training program prescribers was 185. Part D covers Medicare prescriptions only.
What is Reuben Arthur Castillo, M.D.'s MIPS final score?
The 2023 MIPS final score is 94.6 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.