Norys Alexandra Castro Pena, M.D.
NPI 1265797690ActiveIndividual· Internal Medicine, Infectious Disease· San Antonio, TX
Internal Medicine, Infectious Disease (M.D.) with Gmg Health Systems Associates PA, practicing in San Antonio, Texas. Their prescriptions cost Medicare Part D more than their services did: $4,891,814 for 13,092 claims, against $9,375 paid for services in 2024. Gilead Sciences, Inc. was the largest of 10 companies reporting payments in 2025, $1,147 in all, mostly food and beverage.
Overview
| NPI | 1265797690 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jul 11, 2012 |
| Last updated in NPPES | Oct 12, 2017 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Infectious Disease Primary | 207RI0200X | Q7022 | TX |
| Internal Medicine | 207R00000X | Q7022 | 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 - Internal Medicine (TX) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 39 |
|---|---|
| Services billed | 139 across 26 procedure codes |
| Paid by Medicare | $9,375 |
Part D prescriptions in 2024
| Prescriptions (claims) | 13,092 · 29,097 30-day fills |
|---|---|
| Patients | 923 |
| Total drug cost | $4,891,814 |
| Generic share | 79% of claims |
Education and affiliations
| Graduation year | 2009 |
|---|---|
| Medicare specialty | Internal Medicine |
| Secondary specialties | Infectious Disease |
Medical group
- Gmg Health Systems Associates PASan Antonio, TX · 117 clinicians
Industry payments (Open Payments)
- 2025$1,147 · 45 payments from 10 companies
- 2024$1,126 · 46 payments from 12 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Gilead Sciences, Inc. | $331.72 | 7 |
| Viiv Healthcare Company | $288.73 | 14 |
| Abbvie Inc. | $176.03 | 11 |
| Merck Sharp & Dohme LLC | $136.76 | 2 |
| Abbott Laboratories | $49.58 | 2 |
What the 2025 payments were for
- Food and Beverage$1,147 · 45 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 62 infectious disease specialists in San Antonio · All infectious disease specialists in Texas