Marielle Bridget Williamson-Rea, DO
Opted out of Medicare from October 2025 to October 2027. Family Medicine (DO) in Wexford, Pennsylvania, licensed in PA, with an NPI issued in May 2020. Their prescriptions cost Medicare Part D more than their services did: $215,772 for 2,011 claims, against $18,621 paid for services in 2024. Exact Sciences Corporation reported $15.43 in payments in 2024, mostly food and beverage.
Overview
| NPI | 1700407566 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | DO |
| Sole proprietor | No |
| NPI issued | May 4, 2020 |
| Last updated in NPPES | Nov 12, 2025 |
| Certified by provider | Nov 12, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Family Medicine Primary | 207Q00000X | OS023051 | PA |
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 |
|---|---|
| Opt-out | Opted out Oct 15, 2025 – Oct 15, 2027 |
| Can order and refer | Yes |
| Accepts assignment | Yes (participating) |
During an opt-out period the provider sees Medicare patients only under private contracts, and Medicare does not pay claims for their services.
Medicare services in 2024
| Medicare patients | 110 |
|---|---|
| Services billed | 268 across 20 procedure codes |
| Paid by Medicare | $18,621 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,011 · 4,232 30-day fills |
|---|---|
| Patients | 350 |
| Total drug cost | $215,772 |
| Generic share | 88% of claims |
Industry payments (Open Payments)
- 2024$15.43 · 1 payment from 1 company
Top paying companies in 2024
| Company | Amount | Payments |
|---|---|---|
| Exact Sciences Corporation | $15.43 | 1 |
What the 2024 payments were for
- Food and Beverage$15.43 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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