Willem J. Van Der Werf, M.D.
NPI 1275563397ActiveIndividual· Transplant Surgery· Phoenix, AZ
Transplant Surgery (M.D.) in Phoenix, Arizona, trained at University of California, San Francisco School of Medicine (class of 1988). Medicare paid $38,249 for services to 61 patients in 2024. Intuitive Surgical, Inc. was the largest of 2 companies reporting payments in 2025, $3,016 in all, mostly education.
Overview
| NPI | 1275563397 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jul 4, 2006 |
| Last updated in NPPES | Sep 2, 2026 |
| Certified by provider | Sep 2, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Transplant Surgery Primary | 204F00000X | 49927 | AZ |
| Specialist | 174400000X | 5249271205 | UT |
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 - General Surgery (AZ) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 61 |
|---|---|
| Services billed | 140 across 39 procedure codes |
| Paid by Medicare | $38,249 |
Education and affiliations
| Medical school | University of California, San Francisco School of Medicine |
|---|---|
| Graduation year | 1988 |
| Medicare specialty | General Surgery |
Medical groups
- St. Joseph's Hospital and Medical CenterPhoenix, AZ · 21 clinicians
- Arizona Transplant Associates PCPhoenix, AZ · 5 clinicians
Hospital affiliations
- Banner - University Medical Center PhoenixPhoenix, AZ
- St Josephs Hospital and Medical CenterPhoenix, AZ
Industry payments (Open Payments)
- 2025$3,016 · 3 payments from 2 companies
- 2024$3,338 · 6 payments from 3 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Intuitive Surgical, Inc. | $3,000 | 2 |
| Ethicon US, LLC | $16.19 | 1 |
What the 2025 payments were for
- Education$3,000 · 2 payments
- Food and Beverage$16.19 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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