John J. Ziebert, M.D.
NPI 1205811296ActiveIndividual· Internal Medicine, Gastroenterology· Austin, TX
Internal Medicine, Gastroenterology (M.D.) in Austin, Texas, trained at University of Wisconsin School of Medicine (class of 1990). Their prescriptions cost Medicare Part D more than their services did: $1,844,556 for 2,146 claims, against $114,032 paid for services in 2024. Abbvie Inc. was the largest of 16 companies reporting payments in 2025, $1,456 in all, mostly food and beverage.
Overview
| NPI | 1205811296 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Dec 13, 2005 |
| Last updated in NPPES | Feb 14, 2008 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | J5524 | 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) | Not in the public enrollment file of Oct 1, 2026 |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 615 |
|---|---|
| Services billed | 1,250 across 37 procedure codes |
| Paid by Medicare | $114,032 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,146 · 4,033 30-day fills |
|---|---|
| Patients | 651 |
| Total drug cost | $1,844,556 |
| Generic share | 82% of claims |
Education and affiliations
| Medical school | University of Wisconsin School of Medicine |
|---|---|
| Graduation year | 1990 |
| Medicare specialty | Gastroenterology |
| Telehealth | Offers telehealth |
Hospital affiliations
- North Austin Medical CenterAustin, TX
- Round Rock Medical CenterRound Rock, TX
Industry payments (Open Payments)
- 2025$1,456 · 81 payments from 16 companies
- 2024$1,591 · 87 payments from 17 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $445.42 | 26 |
| Gilead Sciences, Inc. | $221.48 | 11 |
| Pfizer Inc. | $182.54 | 16 |
| Madrigal Pharmaceuticals | $133.38 | 5 |
| Genzyme Corporation | $101.51 | 4 |
What the 2025 payments were for
- Food and Beverage$1,456 · 81 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 72 gastroenterologists in Austin · All gastroenterologists in Texas