Mark Lewis Anstadt, ARNP
NPI 1144414145ActiveIndividual· Nurse Practitioner· Seattle, WA
Nurse Practitioner (ARNP) in Seattle, Washington, trained at University of Washington School of Medicine (class of 2007). Their prescriptions cost Medicare Part D more than their services did: $491,904 for 709 claims, against $30,118 paid for services in 2024. Novartis Pharmaceuticals Corporation reported $14.42 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1144414145 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | ARNP |
| Sole proprietor | No |
| NPI issued | Sep 1, 2007 |
| Last updated in NPPES | Jun 29, 2026 |
| Certified by provider | Jun 29, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Nurse Practitioner Primary | 363L00000X | AP30007837 | WA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Nurse Practitioner (WA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 125 |
|---|---|
| Services billed | 1,135 across 35 procedure codes |
| Paid by Medicare | $30,118 |
Part D prescriptions in 2024
| Prescriptions (claims) | 709 · 1,701 30-day fills |
|---|---|
| Patients | 144 |
| Total drug cost | $491,904 |
| Generic share | 37% of claims |
Education and affiliations
| Medical school | University of Washington School of Medicine |
|---|---|
| Graduation year | 2007 |
| Medicare specialty | Nurse Practitioner |
| Telehealth | Offers telehealth |
Medical groups
- Optum Care Washington PLLCEverett, WA · 683 clinicians
- The Polyclinic PLLCSeattle, WA · 365 clinicians
Industry payments (Open Payments)
- 2025$14.42 · 1 payment from 1 company
- 2024$289.22 · 6 payments from 3 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Novartis Pharmaceuticals Corporation | $14.42 | 1 |
What the 2025 payments were for
- Food and Beverage$14.42 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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