Loui Chan Gatdula, MD
NPI 1528314721ActiveIndividual· Internal Medicine· Longview, TX
Internal Medicine (MD) with Christus Trinity Clinic Texas, practicing in Longview, Texas. Their prescriptions cost Medicare Part D more than their services did: $601,288 for 7,001 claims, against $55,959 paid for services in 2024. Evoke Pharma, Inc. was the largest of 3 companies reporting payments in 2025, $207.04 in all, mostly food and beverage. Lists Christus Good Shepherd Medical Center and 3 other hospitals as hospital affiliations.
Overview
| NPI | 1528314721 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jul 25, 2012 |
| Last updated in NPPES | Jun 17, 2016 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | Q3516 | TX |
| Internal Medicine | 207R00000X | BP10044198 | 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 | 204 |
|---|---|
| Services billed | 1,087 across 22 procedure codes |
| Paid by Medicare | $55,959 |
Part D prescriptions in 2024
| Prescriptions (claims) | 7,001 · 16,056 30-day fills |
|---|---|
| Patients | 509 |
| Total drug cost | $601,288 |
| Generic share | 88% of claims |
Education and affiliations
| Graduation year | 2005 |
|---|---|
| Medicare specialty | Internal Medicine |
Medical group
- Christus Trinity Clinic TexasTyler, TX · 1,540 clinicians
Hospital affiliations
- Christus Good Shepherd Medical CenterLongview, TX
- Christus Mother Frances HospitalTyler, TX
- Longview Regional Medical CenterLongview, TX
- University of Texas Health Science Center at TylerTyler, TX
Other facilities
- Accentcare Home Health of TexasHome health agency · Longview, TX
- Christus Good ShepherdHome health agency · Longview, TX
Industry payments (Open Payments)
- 2025$207.04 · 3 payments from 3 companies
- 2024$211.50 · 2 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Evoke Pharma, Inc. | $123.95 | 1 |
| Teva Pharmaceuticals USA, Inc. | $52.80 | 1 |
| Eisai Inc. | $30.29 | 1 |
What the 2025 payments were for
- Food and Beverage$207.04 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 119 internal medicine physicians in Longview · All internal medicine physicians in Texas