Oscar A. Alvarez, MD
NPI 1376565838ActiveIndividual· Internal Medicine, Gastroenterology· Harlingen, TX
Internal Medicine, Gastroenterology (MD) with Gastroenterology Consultants of South Texas, PLLC, practicing in Harlingen, Texas. In 2024 Medicare paid $18,804 for 116 patients, and Part D covered 251 of their prescriptions, 79% of them generic. Phathom Pharmaceuticals, Inc. was the largest of 2 companies reporting payments in 2025, $164.91 in all, mostly food and beverage. Lists Doctors Hosptal at Renaissance and 1 other hospital as hospital affiliations.
Overview
| NPI | 1376565838 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jul 24, 2006 |
| Last updated in NPPES | Jul 14, 2022 |
| Certified by provider | Jul 14, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | J5967 | 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 - Gastroenterology (TX) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 116 |
|---|---|
| Services billed | 165 across 20 procedure codes |
| Paid by Medicare | $18,804 |
Part D prescriptions in 2024
| Prescriptions (claims) | 251 · 319 30-day fills |
|---|---|
| Patients | 134 |
| Total drug cost | $15,883 |
| Generic share | 79% of claims |
Education and affiliations
| Graduation year | 1983 |
|---|---|
| Medicare specialty | Gastroenterology |
| Secondary specialties | Internal Medicine |
Medical group
- Gastroenterology Consultants of South Texas, PLLCHarlingen, TX · 42 clinicians
Hospital affiliations
- Doctors Hosptal at RenaissanceEdinburg, TX
- South Texas Health SystemEdinburg, TX
Industry payments (Open Payments)
- 2025$164.91 · 3 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Phathom Pharmaceuticals, Inc. | $131.91 | 1 |
| Abbvie Inc. | $33.00 | 2 |
What the 2025 payments were for
- Food and Beverage$164.91 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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