Alwin Heber Lopez-Toro
NPI 1962820506ActiveIndividual· Internal Medicine, Nephrology· San Antonio, TX
Internal Medicine, Nephrology with Renal Associates, P.A., practicing in San Antonio, Texas. Their prescriptions cost Medicare Part D more than their services did: $405,645 for 2,046 claims, against $112,592 paid for services in 2024. Bayer Healthcare Pharmaceuticals Inc. was the largest of 5 companies reporting payments in 2025, $262.86 in all, mostly food and beverage. Lists Baptist Medical Center and 1 other hospital as hospital affiliations.
Overview
| NPI | 1962820506 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Sole proprietor | No |
| NPI issued | Apr 1, 2014 |
| Last updated in NPPES | Mar 13, 2025 |
| Certified by provider | Mar 13, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Nephrology Primary | 207RN0300X | R9247 | TX |
| Internal Medicine | 207R00000X | BP10058787 | TX |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Nephrology (TX) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 235 |
|---|---|
| Services billed | 2,729 across 29 procedure codes |
| Paid by Medicare | $112,592 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,046 · 4,253 30-day fills |
|---|---|
| Patients | 344 |
| Total drug cost | $405,645 |
| Generic share | 87% of claims |
Education and affiliations
| Graduation year | 2014 |
|---|---|
| Medicare specialty | Nephrology |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Renal Associates, P.A.Seguin, TX · 40 clinicians
Hospital affiliations
- Baptist Medical CenterSan Antonio, TX
- Methodist HospitalSan Antonio, TX
Other facilities
- Fmc Dialysis Services of Southwest San AntonioDialysis facility · San Antonio, TX
Industry payments (Open Payments)
- 2025$262.86 · 8 payments from 5 companies
- 2024$117.35 · 7 payments from 6 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Bayer Healthcare Pharmaceuticals Inc. | $135.22 | 2 |
| Lilly USA, LLC | $53.01 | 2 |
| Astrazeneca Pharmaceuticals LP | $30.38 | 2 |
| Amgen Inc. | $22.31 | 1 |
| Ardelyx, Inc. | $21.94 | 1 |
What the 2025 payments were for
- Food and Beverage$262.86 · 8 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 168 nephrologists in San Antonio · All nephrologists in Texas