Catherine P. Hirsch, M.D.
NPI 1598795171ActiveIndividual· Internal Medicine, Gastroenterology· Pascagoula, MS
Internal Medicine, Gastroenterology (M.D.) in Pascagoula, Mississippi, trained at University of Mississippi School of Medicine (class of 1983). Their prescriptions cost Medicare Part D more than their services did: $934,833 for 2,642 claims, against $102,288 paid for services in 2024. Ardelyx, Inc. reported $23.75 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1598795171 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jul 3, 2006 |
| Last updated in NPPES | Jun 4, 2013 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 10285 | MS |
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 (MS) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 718 |
|---|---|
| Services billed | 1,432 across 44 procedure codes |
| Paid by Medicare | $102,288 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,642 · 4,418 30-day fills |
|---|---|
| Patients | 647 |
| Total drug cost | $934,833 |
| Generic share | 89% of claims |
Education and affiliations
| Medical school | University of Mississippi School of Medicine |
|---|---|
| Graduation year | 1983 |
| Medicare specialty | Gastroenterology |
Medical group
- Singing River Health SystemOcean Springs, MS · 295 clinicians
Hospital affiliations
- Singing River GulfportGulfport, MS
- Singing River Health SystemPascagoula, MS
Industry payments (Open Payments)
- 2025$23.75 · 1 payment from 1 company
- 2024$1,081 · 56 payments from 15 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Ardelyx, Inc. | $23.75 | 1 |
What the 2025 payments were for
- Food and Beverage$23.75 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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