Oreste Castellanos, M.D.
NPI 1013945286 · Adult Medicine Physician · Mayaguez, PR
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Oreste Castellanos, M.D. is a Adult Medicine Physician provider in Mayaguez, PR (NPI 1013945286).
Provider details
- NPI number
- 1013945286
- Entity type
- Individual
- Primary specialty
- Adult Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 9785 (PR)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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
1 documented practice location
- 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 · 25 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Losartan Potassium | 80 | 12 |
| Levothyroxine Sodiumbrand: Synthroid | 49 | — |
| Atorvastatin Calcium | 40 | — |
| Omeprazole | 40 | — |
| Atenolol | 37 | — |
| Famotidine | 36 | — |
| Gabapentin | 36 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$95 across 3 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
Registry dates
- Enumerated
- 2006-06-28
- Last updated
- 2007-07-08
Frequently asked questions
- What is Oreste Castellanos's NPI number?
- Oreste Castellanos's National Provider Identifier (NPI) is 1013945286, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Oreste Castellanos's specialty?
- Oreste Castellanos is listed in the NPPES registry with a primary specialty of Adult Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Oreste Castellanos located?
- Oreste Castellanos's practice location on file with NPPES is Ave Hostos, Mayaguez, PR 00682-6353.
- What is Oreste Castellanos's phone number?
- The practice phone number listed in the NPPES registry for Oreste Castellanos is (787) 834-6070.
- Does Oreste Castellanos accept Medicare?
- Oreste Castellanos is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Oreste Castellanos's NPI active?
- Yes — Oreste Castellanos's NPI (1013945286) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.