Isabella Maria Oldenburg, PA
NPI 1154882835ActiveIndividual· Physician Assistant· Providence, RI
Physician Assistant (PA) with University Gastroenterology, LLC, practicing in Providence, Rhode Island. Their prescriptions cost Medicare Part D more than their services did: $38,063 for 424 claims, against $21,393 paid for services in 2024. Takeda Pharmaceuticals U.S.A., Inc. was the largest of 3 companies reporting payments in 2025, $105.99 in all, mostly food and beverage. Lists Rhode Island Hospital and 1 other hospital as hospital affiliations.
Overview
| NPI | 1154882835 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | PA |
| Sole proprietor | No |
| NPI issued | Mar 26, 2019 |
| Last updated in NPPES | Oct 15, 2025 |
| Certified by provider | Oct 15, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Physician Assistant Primary | 363A00000X | PA01442 | RI |
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 - Physician Assistant (RI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 156 |
|---|---|
| Services billed | 524 across 10 procedure codes |
| Paid by Medicare | $21,393 |
Part D prescriptions in 2024
| Prescriptions (claims) | 424 · 632 30-day fills |
|---|---|
| Patients | 241 |
| Total drug cost | $38,063 |
| Generic share | 84% of claims |
Education and affiliations
| Graduation year | 2019 |
|---|---|
| Medicare specialty | Physician Assistant |
| Telehealth | Offers telehealth |
Medical group
- University Gastroenterology, LLCProvidence, RI · 102 clinicians
Hospital affiliations
- Rhode Island HospitalProvidence, RI
- The Miriam HospitalProvidence, RI
Industry payments (Open Payments)
- 2025$105.99 · 3 payments from 3 companies
- 2024$40.95 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Takeda Pharmaceuticals U.S.A., Inc. | $54.87 | 1 |
| Phathom Pharmaceuticals, Inc. | $34.24 | 1 |
| Novo Nordisk Inc | $16.88 | 1 |
What the 2025 payments were for
- Food and Beverage$105.99 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 268 physician assistants in Providence · All physician assistants in Rhode Island