Catherine D. Linzay, MD
NPI 1619364247ActiveIndividual· Internal Medicine, Gastroenterology· Shreveport, LA
Internal Medicine, Gastroenterology (MD) in Shreveport, Louisiana, trained at Louisiana State University School of Medicine in Shreveport (class of 2015). In 2024 Medicare paid $122,833 for 590 patients, and Part D covered 475 of their prescriptions, 84% of them generic. Abbvie Inc. was the largest of 10 companies reporting payments in 2025, $604.28 in all, mostly food and beverage.
Overview
| NPI | 1619364247 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | Yes |
| NPI issued | Apr 21, 2015 |
| Last updated in NPPES | Oct 29, 2026 |
| Certified by provider | Oct 29, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 304986 | LA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Gastroenterology (LA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 590 |
|---|---|
| Services billed | 1,624 across 56 procedure codes |
| Paid by Medicare | $122,833 |
Part D prescriptions in 2024
| Prescriptions (claims) | 475 · 655 30-day fills |
|---|---|
| Patients | 172 |
| Total drug cost | $65,866 |
| Generic share | 84% of claims |
Education and affiliations
| Medical school | Louisiana State University School of Medicine in Shreveport |
|---|---|
| Graduation year | 2015 |
| Medicare specialty | Gastroenterology |
Medical groups
- Capitol City Family Health Center IncorporatedBaton Rouge, LA · 41 clinicians
- Gastrointestinal Specialists AmcShreveport, LA · 33 clinicians
- Gi Specialists Hospitalists at WkmcShreveport, LA · 11 clinicians
Hospital affiliations
- Christus Shreveport-Bossier Health SystemShreveport, LA
- Christus St Frances Cabrini HospitalAlexandria, LA
- Willis Knighton Medical CenterShreveport, LA
- Winn Parish Medical CenterWinnfield, LA
Industry payments (Open Payments)
- 2025$604.28 · 28 payments from 10 companies
- 2024$429.56 · 21 payments from 7 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $237.69 | 14 |
| Neuraxis, Inc. | $134.58 | 1 |
| Phathom Pharmaceuticals, Inc. | $64.83 | 4 |
| Takeda Pharmaceuticals U.S.A., Inc. | $47.14 | 2 |
| Lilly USA, LLC | $38.25 | 2 |
What the 2025 payments were for
- Food and Beverage$604.28 · 28 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Internal Medicine, Gastroenterology providers in Shreveport
- 1316982853
- 1962411595
- 1487683587
- 1932171725
- 1255676870
- 1134151996
- 1003285255
- 1851349070
- 1669455226
- 1366432577
- 1477073906
- 1225725187
All Internal Medicine, Gastroenterology providers in Louisiana →