Rene Alberto Castillo, MD
Internal Medicine, Medical Oncology (MD) with Texas Oncology PA, practicing in Austin, Texas. In 2024 Medicare paid $3,757,148 for 1,076 patients, and Part D covered 2,608 of their prescriptions, 80% of them generic. Celgene Corporation was the largest of 6 companies reporting payments in 2025, $201.57 in all, mostly food and beverage. Lists Christus Santa Rosa Hospital-San Marcos and 3 other hospitals as hospital affiliations. A record with the same name and state is on the OIG exclusion list; it carries no NPI, so check it before acting.
Overview
| NPI | 1134186166 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Apr 26, 2006 |
| Last updated in NPPES | Feb 10, 2023 |
| Certified by provider | Feb 2, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Medical Oncology Primary | 207RX0202X | M3964 | TX |
| Internal Medicine, Hematology & Oncology | 207RH0003X | MD.12610R | LA |
| Internal Medicine, Hematology & Oncology | 207RH0003X | M3964 | TX |
Exclusion screening
Possible match: verify before acting. The OIG list has a record with the same name in Texas, but that record carries no NPI, so it may be a different person or business.
| Matched by | Name on OIG list | Exclusion type | Excluded since | Location |
|---|---|---|---|---|
| Name + state | Rene Queary Castillo · Nurse/Nurses Aide | 1128b4 | Feb 18, 2016 | Arlington, TX |
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | Possible (name) | See above |
| North Carolina Medicaid · Nov 4, 2026 | No match | — |
| New York OMIG · Nov 4, 2026 | No match | — |
| Ohio Medicaid · Nov 4, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 4, 2026 | No match | — |
| Washington HCA · Nov 4, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Medical Oncology (TX) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 1,076 |
|---|---|
| Services billed | 286,959 across 196 procedure codes |
| Paid by Medicare | $3,757,148 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,608 · 4,139 30-day fills |
|---|---|
| Patients | 415 |
| Total drug cost | $4,594,779 |
| Generic share | 80% of claims |
Education and affiliations
| Graduation year | 1987 |
|---|---|
| Medicare specialty | Medical Oncology |
| Telehealth | Offers telehealth |
Medical group
- Texas Oncology PAPlano, TX · 1,014 clinicians
Hospital affiliations
- Christus Santa Rosa Hospital-San MarcosSan Marcos, TX
- Guadalupe Regional Medical CenterSeguin, TX
- Memorial HospitalGonzales, TX
- St David's South Austin Medical CenterAustin, TX
Industry payments (Open Payments)
- 2025$201.57 · 10 payments from 6 companies
- 2024$150.41 · 8 payments from 7 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Celgene Corporation | $87.26 | 4 |
| Glaxosmithkline, LLC. | $29.92 | 2 |
| Jazz Pharmaceuticals Inc. | $28.84 | 1 |
| Daiichi Sankyo Inc. | $19.19 | 1 |
| Servier Pharmaceuticals LLC | $19.04 | 1 |
What the 2025 payments were for
- Food and Beverage$201.57 · 10 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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