Nathan Vandegraaff
NPI 1215614037ActiveIndividual· Physician Assistant· Phoenix, AZ
Physician Assistant in Phoenix, Arizona, trained at Midwestern University College of Dental Medicine, Glendale (class of 2023). Their prescriptions cost Medicare Part D more than their services did: $173,779 for 1,288 claims, against $7,460 paid for services in 2024. Pfizer Inc. was the largest of 15 companies reporting payments in 2025, $1,849 in all, mostly food and beverage.
Overview
| NPI | 1215614037 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Sole proprietor | No |
| NPI issued | Jul 3, 2023 |
| Last updated in NPPES | Jul 3, 2023 |
| Certified by provider | Jul 3, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Physician Assistant Primary | 363A00000X | 9728 | AZ |
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 - Physician Assistant (AZ) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 84 |
|---|---|
| Services billed | 126 across 4 procedure codes |
| Paid by Medicare | $7,460 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,288 · 2,930 30-day fills |
|---|---|
| Patients | 340 |
| Total drug cost | $173,779 |
| Generic share | 86% of claims |
Education and affiliations
| Medical school | Midwestern University College of Dental Medicine, Glendale |
|---|---|
| Graduation year | 2023 |
| Medicare specialty | Physician Assistant |
Medical group
- Heart One Associates LLCPhoenix, AZ · 21 clinicians
Industry payments (Open Payments)
- 2025$1,849 · 59 payments from 15 companies
- 2024$865.13 · 39 payments from 16 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Pfizer Inc. | $318.58 | 11 |
| Abiomed | $259.39 | 2 |
| Kestra Medical Technology Services, Inc. | $255.34 | 8 |
| Merck Sharp & Dohme LLC | $186.21 | 7 |
| E.R. Squibb & Sons, L.L.C. | $169.45 | 7 |
What the 2025 payments were for
- Food and Beverage$1,849 · 59 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 949 physician assistants in Phoenix · All physician assistants in Arizona