Luis F. Bieler, MD
NPI 1033126636ActiveIndividual· Internal Medicine· San Antonio, TX
Internal Medicine (MD) with Gmg Health Systems Associates PA, practicing in San Antonio, Texas. Their prescriptions cost Medicare Part D more than their services did: $1,381,705 for 9,052 claims, against $10,507 paid for services in 2024. Lilly USA, LLC was the largest of 15 companies reporting payments in 2025, $1,720 in all, mostly food and beverage.
Overview
| NPI | 1033126636 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | Yes |
| NPI issued | Aug 3, 2006 |
| Last updated in NPPES | Mar 2, 2009 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | K1366 | 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 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Internal Medicine (TX) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 62 |
|---|---|
| Services billed | 251 across 19 procedure codes |
| Paid by Medicare | $10,507 |
Part D prescriptions in 2024
| Prescriptions (claims) | 9,052 · 19,808 30-day fills |
|---|---|
| Patients | 756 |
| Total drug cost | $1,381,705 |
| Generic share | 82% of claims |
Education and affiliations
| Graduation year | 1988 |
|---|---|
| Medicare specialty | Internal Medicine |
Medical group
- Gmg Health Systems Associates PASan Antonio, TX · 117 clinicians
Industry payments (Open Payments)
- 2025$1,720 · 89 payments from 15 companies
- 2024$327.69 · 21 payments from 6 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Lilly USA, LLC | $323.43 | 15 |
| Boehringer Ingelheim Pharmaceuticals, Inc. | $293.94 | 9 |
| Novo Nordisk Inc | $261.20 | 14 |
| Astrazeneca Pharmaceuticals LP | $236.49 | 17 |
| Sumitomo Pharma America, Inc. | $156.46 | 12 |
What the 2025 payments were for
- Food and Beverage$1,720 · 89 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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