Margaret Ann Tuinstra, NP
NPI 1457045981ActiveIndividual· Nurse Practitioner, Family· Bethesda, MD
Nurse Practitioner, Family (NP) with Johns Hopkins Community Physicians, Inc, practicing in Bethesda, Maryland. Their prescriptions cost Medicare Part D more than their services did: $171,065 for 656 claims, against $52,470 paid for services in 2024. Medtronic, Inc. reported $143.22 in payments in 2025, mostly food and beverage. Lists Suburban Hospital as a hospital affiliation.
Overview
| NPI | 1457045981 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | NP |
| Sole proprietor | Yes |
| NPI issued | Jun 7, 2023 |
| Last updated in NPPES | Jun 7, 2023 |
| Certified by provider | Mar 13, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Nurse Practitioner, Family Primary | 363LF0000X | AC005318 | MD |
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 - Nurse Practitioner (DC); Practitioner - Nurse Practitioner (MD) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 514 |
|---|---|
| Services billed | 880 across 11 procedure codes |
| Paid by Medicare | $52,470 |
Part D prescriptions in 2024
| Prescriptions (claims) | 656 · 1,701 30-day fills |
|---|---|
| Patients | 184 |
| Total drug cost | $171,065 |
| Generic share | 81% of claims |
Education and affiliations
| Graduation year | 2022 |
|---|---|
| Medicare specialty | Nurse Practitioner |
Medical group
- Johns Hopkins Community Physicians, IncLaurel, MD · 763 clinicians
Hospital affiliation
- Suburban HospitalBethesda, MD
Industry payments (Open Payments)
- 2025$143.22 · 3 payments from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Medtronic, Inc. | $143.22 | 3 |
What the 2025 payments were for
- Food and Beverage$143.22 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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