Madeleine Oster, DNP, NP
NPI 1023654084ActiveIndividual· Nurse Practitioner· Stanford, CA
Nurse Practitioner (DNP, NP) in Stanford, California, trained at University of Alabama School of Medicine (class of 2019). Their prescriptions cost Medicare Part D more than their services did: $149,753 for 432 claims, against $71,946 paid for services in 2024. Heartflow, Inc. was the largest of 2 companies reporting payments in 2025, $331.71 in all, mostly food and beverage.
Overview
| NPI | 1023654084 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | DNP, NP |
| Sole proprietor | No |
| NPI issued | Nov 25, 2019 |
| Last updated in NPPES | Dec 30, 2025 |
| Certified by provider | Dec 30, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Nurse Practitioner Primary | 363L00000X | 95013926 | CA |
| Nurse Practitioner, Adult Health | 363LA2200X | 95013926 | CA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 4, 2026 | No match | — |
| New York OMIG · Nov 4, 2026 | No match | — |
| Ohio Medicaid · Nov 4, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 4, 2026 | No match | — |
| Washington HCA · Nov 4, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Nurse Practitioner (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 395 |
|---|---|
| Services billed | 890 across 24 procedure codes |
| Paid by Medicare | $71,946 |
Part D prescriptions in 2024
| Prescriptions (claims) | 432 · 831 30-day fills |
|---|---|
| Patients | 120 |
| Total drug cost | $149,753 |
| Generic share | 63% of claims |
Education and affiliations
| Medical school | University of Alabama School of Medicine |
|---|---|
| Graduation year | 2019 |
| Medicare specialty | Nurse Practitioner |
| Telehealth | Offers telehealth |
Medical group
- Stanford Health CareStanford, CA · 3,122 clinicians
Hospital affiliations
- Stanford Health CareStanford, CA
- Stanford Health Care Tri-ValleyPleasanton, CA
Industry payments (Open Payments)
- 2025$331.71 · 2 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Heartflow, Inc. | $191.83 | 1 |
| Novartis Pharmaceuticals Corporation | $139.88 | 1 |
What the 2025 payments were for
- Food and Beverage$331.71 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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