Physician Profile
Reuben A. Castillo, M.D.
Unclaimed ProfileAbout Dr. Castillo
Based in Loma Linda, CA, Reuben A. Castillo, M.D. is listed in the NPI registry under student in an organized health care education program. Reuben graduated from University of California, San Francisco School of Medicine in 2010. Medicare claims data shows Reuben provided 661 services to 642 patients. The services billed most often include emergency department visit with high level of medical decision making, routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only, and critical care, first 30-74 minutes.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it — free, and no identity document with a practice or institutional email.
Education & Training
Specialty
Credentials & Licensing
License numbers are what the provider reported to NPPES when the NPI was issued or updated. NPPES does not verify licensure; confirm current standing with the state licensing board.
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (559) 967-3896
- Email not available
Practice Locations
11234 ANDERSON ST GME OFFICE CP 21005
Loma Linda, CA 92354
Procedures Most Often Billed to Medicare
661 services · 642 patients · 4 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only | Treatment | 93010 |
204 | More often than most peers in Student in training |
| Emergency department visit with high level of medical decision making | Office visit | 99285 |
321 | More than most peers in Student in training |
| Critical care, first 30-74 minutes | Office visit | 99291 |
70 | More often than most peers in Student in training |
| Emergency department visit with moderate level of medical decision making | Office visit | 99284 |
66 | More often than most peers in Student in training |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other medical trainees at this location 8
Same specialty, same street address — most likely the same department or group.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Other medical trainees in Loma Linda 4
Same specialty, same city.
More connections — 24 related providers in 3 groups
Trained at University of California, San Francisco School of Medicine 8
Other providers in the same specialty who trained at the same institution.
Class of 2010 at University of California, San Francisco School of Medicine 8
Providers who graduated from the same medical school in the same year.
Also performs Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only 8
Providers in CA who bill this service to Medicare most often.
Common questions
What is Reuben A. Castillo's specialty?
Reuben A. Castillo is a medical trainee in Loma Linda, CA. That is the designation recorded for this NPI in the federal registry, where it is listed as “Student in an Organized Health Care Education Program”.
NPI registry
Where can I find Reuben A. Castillo?
Reuben A. Castillo is listed at 11234 Anderson St Gme Office Cp 21005, Loma Linda, CA 92354. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Reuben A. Castillo?
The number on file is (559) 967-3896. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for Reuben A. Castillo?
Reuben A. Castillo's National Provider Identifier is 1043539935. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
What is Reuben A. Castillo's education?
Reuben A. Castillo attended University of California, San Francisco School of Medicine, graduating in 2010. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Reuben A. Castillo have?
Reuben A. Castillo has 16 years experience. Calculated from a graduation year of 2010, reported in the CMS National Downloadable File.
CMS public data
What is Reuben A. Castillo known for?
According to Medicare billing data, Reuben A. Castillo provides treatments such as routine electrocardiogram using at least 12 leads with interpretation and report only, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Reuben A. Castillo's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Reuben A. Castillo. If this is you, claiming it is free.
Guide.md
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.