Ronald L. Drengler, M.D.
NPI 1265459168ActiveIndividual· Internal Medicine, Medical Oncology· San Antonio, TX
Internal Medicine, Medical Oncology (M.D.) with South Texas Oncology and Hematology, PLLC, practicing in San Antonio, Texas. In 2024 Medicare paid $8,321,894 for 355 patients, and Part D covered 1,574 of their prescriptions, 73% of them generic. Pfizer Inc. was the largest of 33 companies reporting payments in 2025, $2,089 in all, mostly food and beverage. Lists Methodist Hospital as a hospital affiliation.
Overview
| NPI | 1265459168 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jul 16, 2006 |
| Last updated in NPPES | Jul 11, 2013 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Medical Oncology Primary | 207RX0202X | J4091 | TX |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| 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 | 355 |
|---|---|
| Services billed | 371,657 across 189 procedure codes |
| Paid by Medicare | $8,321,894 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,574 · 1,748 30-day fills |
|---|---|
| Patients | 206 |
| Total drug cost | $3,931,831 |
| Generic share | 73% of claims |
Education and affiliations
| Graduation year | 1988 |
|---|---|
| Medicare specialty | Medical Oncology |
Medical group
- South Texas Oncology and Hematology, PLLCSan Antonio, TX · 41 clinicians
Hospital affiliation
- Methodist HospitalSan Antonio, TX
Other facilities
- Mi Familia Home HealthHome health agency · Corpus Christi, TX
Industry payments (Open Payments)
- 2025$2,089 · 74 payments from 33 companies
- 2024$2,829 · 95 payments from 36 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Pfizer Inc. | $431.58 | 12 |
| Galvanize Therapeutics, Inc | $163.75 | 1 |
| Celgene Corporation | $160.61 | 7 |
| E.R. Squibb & Sons, L.L.C. | $151.28 | 6 |
| Janssen Biotech, Inc. | $126.27 | 6 |
What the 2025 payments were for
- Food and Beverage$2,074 · 73 payments
- Education$14.88 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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