Gregory Anstead, MD
NPI 1144337213ActiveIndividual· Internal Medicine, Infectious Disease· San Antonio, TX
Internal Medicine, Infectious Disease (MD) with University of Texas Health Science Center at San Antonio, practicing in San Antonio, Texas. Their prescriptions cost Medicare Part D more than their services did: $1,315,313 for 1,331 claims, against $2,037 paid for services in 2024. Gilead Sciences, Inc. was the largest of 2 companies reporting payments in 2025, $18,472 in all, mostly speaking and faculty fees. Lists University Health System as a hospital affiliation.
Overview
| NPI | 1144337213 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Aug 24, 2006 |
| Last updated in NPPES | May 22, 2008 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Infectious Disease Primary | 207RI0200X | K9989 | 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 - Infectious Disease (TX) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 15 |
|---|---|
| Services billed | 38 across 5 procedure codes |
| Paid by Medicare | $2,037 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,331 · 2,118 30-day fills |
|---|---|
| Patients | 41 |
| Total drug cost | $1,315,313 |
| Generic share | 65% of claims |
Education and affiliations
| Graduation year | 1993 |
|---|---|
| Medicare specialty | Infectious Disease |
| Secondary specialties | Internal Medicine |
Medical group
- University of Texas Health Science Center at San AntonioSan Antonio, TX · 1,297 clinicians
Hospital affiliation
- University Health SystemSan Antonio, TX
Industry payments (Open Payments)
- 2025$18,472 · 16 payments from 2 companies
- 2024$16,168 · 15 payments from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Gilead Sciences, Inc. | $18,446 | 15 |
| Viiv Healthcare Company | $25.72 | 1 |
What the 2025 payments were for
- Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$15,900 · 5 payments
- Travel and Lodging$2,291 · 5 payments
- Food and Beverage$280.29 · 6 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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