Mackenzie Williams Houser, CRNP
NPI 1336510163ActiveIndividual· Nurse Practitioner, Primary Care· Media, PA
Nurse Practitioner, Primary Care (CRNP) with Alliance Cancer Specialists P.C., practicing in Media, Pennsylvania. Their prescriptions cost Medicare Part D more than their services did: $272,346 for 314 claims, against $17,829 paid for services in 2024. Novartis Pharmaceuticals Corporation was the largest of 34 companies reporting payments in 2025, $4,681 in all, mostly food and beverage. Lists Main Line Hospital Lankenau and 1 other hospital as hospital affiliations.
Overview
| NPI | 1336510163 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | CRNP |
| Sole proprietor | No |
| NPI issued | Oct 20, 2015 |
| Last updated in NPPES | Oct 15, 2025 |
| Certified by provider | Oct 15, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Nurse Practitioner, Primary Care Primary | 363LP2300X | SP015431 | 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) | Enrolled Practitioner - Nurse Practitioner (PA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 132 |
|---|---|
| Services billed | 367 across 13 procedure codes |
| Paid by Medicare | $17,829 |
Part D prescriptions in 2024
| Prescriptions (claims) | 314 · 402 30-day fills |
|---|---|
| Patients | 115 |
| Total drug cost | $272,346 |
| Generic share | 82% of claims |
Education and affiliations
| Graduation year | 2015 |
|---|---|
| Medicare specialty | Nurse Practitioner |
Medical group
- Alliance Cancer Specialists P.C.Sellersville, PA · 43 clinicians
Hospital affiliations
- Main Line Hospital LankenauWynnewood, PA
- Riddle Memorial HospitalMedia, PA
Industry payments (Open Payments)
- 2025$4,681 · 182 payments from 34 companies
- 2024$2,104 · 94 payments from 30 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Novartis Pharmaceuticals Corporation | $925.33 | 21 |
| Astrazeneca Pharmaceuticals LP | $690.70 | 28 |
| Janssen Biotech, Inc. | $292.06 | 11 |
| Daiichi Sankyo Inc. | $279.36 | 13 |
| Merck Sharp & Dohme LLC | $277.71 | 13 |
What the 2025 payments were for
- Food and Beverage$3,964 · 174 payments
- Long term medical supply or device loan$598.20 · 6 payments
- Education$119.29 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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