David S. Hernandez, MD
Internal Medicine, Pulmonary Disease (MD) in New Braunfels, Texas, trained at University of Texas Medical Branch at Galveston (class of 2000). Their prescriptions cost Medicare Part D more than their services did: $691,672 for 2,951 claims, against $183,460 paid for services in 2024. Glaxosmithkline, LLC. was the largest of 2 companies reporting payments in 2025, $34.81 in all, mostly food and beverage. 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 | 1578505665 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jun 12, 2006 |
| Last updated in NPPES | Jun 16, 2013 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Pulmonary Disease Primary | 207RP1001X | M4148 | 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 | David Hernandez · Owner/Operator | 1128a1 | Oct 20, 2010 | Beaumont, TX |
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | Possible (name) | See above |
| 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 - Pulmonary Disease (TX) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 842 |
|---|---|
| Services billed | 2,848 across 16 procedure codes |
| Paid by Medicare | $183,460 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,951 · 3,795 30-day fills |
|---|---|
| Patients | 472 |
| Total drug cost | $691,672 |
| Generic share | 60% of claims |
Education and affiliations
| Medical school | University of Texas Medical Branch at Galveston |
|---|---|
| Graduation year | 2000 |
| Medicare specialty | Pulmonary Disease |
Hospital affiliations
- Christus Santa Rosa Hospital-San MarcosSan Marcos, TX
- Guadalupe Regional Medical CenterSeguin, TX
Industry payments (Open Payments)
- 2025$34.81 · 2 payments from 2 companies
- 2024$22.83 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Glaxosmithkline, LLC. | $17.43 | 1 |
| Insmed, Inc. | $17.38 | 1 |
What the 2025 payments were for
- Food and Beverage$17.43 · 1 payment
- Education$17.38 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Internal Medicine, Pulmonary Disease providers in New Braunfels
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- 1437956067
- 1194415224
- 1447442942
All Internal Medicine, Pulmonary Disease providers in Texas →