Mary Susan Williams, ANP
NPI 1235417759ActiveIndividual· Nurse Practitioner, Adult Health· McKinney, TX
Nurse Practitioner, Adult Health (ANP) with Healthtexas Provider Network, practicing in McKinney, Texas. Their prescriptions cost Medicare Part D more than their services did: $441,489 for 751 claims, against $11,120 paid for services in 2024. Abbott Laboratories was the largest of 9 companies reporting payments in 2025, $957.49 in all, mostly food and beverage. Lists Baylor Scott & White the Heart Hospital Plano as a hospital affiliation.
Overview
| NPI | 1235417759 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | ANP |
| Sole proprietor | No |
| NPI issued | Aug 1, 2011 |
| Last updated in NPPES | Jan 11, 2024 |
| Certified by provider | Jan 11, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Nurse Practitioner, Adult Health Primary | 363LA2200X | 748132 | 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) | Enrolled Practitioner - Nurse Practitioner (TX) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 91 |
|---|---|
| Services billed | 176 across 19 procedure codes |
| Paid by Medicare | $11,120 |
Part D prescriptions in 2024
| Prescriptions (claims) | 751 · 1,961 30-day fills |
|---|---|
| Patients | 228 |
| Total drug cost | $441,489 |
| Generic share | 81% of claims |
Education and affiliations
| Graduation year | 2011 |
|---|---|
| Medicare specialty | Nurse Practitioner |
| Telehealth | Offers telehealth |
Medical group
- Healthtexas Provider NetworkWaxahachie, TX · 2,697 clinicians
Hospital affiliation
Industry payments (Open Payments)
- 2025$957.49 · 35 payments from 9 companies
- 2024$1,087 · 37 payments from 10 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbott Laboratories | $531.53 | 13 |
| Merck Sharp & Dohme LLC | $206.20 | 11 |
| Pfizer Inc. | $51.32 | 3 |
| Biotronik Inc. | $47.25 | 2 |
| Zoll Services LLC (A/K/A Zoll Lifecor Corp) | $46.26 | 2 |
What the 2025 payments were for
- Food and Beverage$957.49 · 35 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 23 adult health nurse practitioners in McKinney · All adult health nurse practitioners in Texas