Walter Stadler, MD
NPI 1033272547ActiveIndividual· Internal Medicine, Hematology & Oncology· Zion, IL
Internal Medicine, Hematology & Oncology (MD) in Zion, Illinois, trained at Yale University School of Medicine (class of 1988). Their prescriptions cost Medicare Part D more than their services did: $2,488,657 for 891 claims, against $39,736 paid for services in 2024. Merck Sharp & Dohme LLC was the largest of 6 companies reporting payments in 2025, $11,582 in all, mostly consulting fees.
Overview
| NPI | 1033272547 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Dec 18, 2006 |
| Last updated in NPPES | Feb 13, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Hematology & Oncology Primary | 207RH0003X | 036081259 | IL |
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 - Hematology/Oncology (IL); Practitioner - Hematology/Oncology (IN) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 159 |
|---|---|
| Services billed | 674 across 16 procedure codes |
| Paid by Medicare | $39,736 |
Part D prescriptions in 2024
| Prescriptions (claims) | 891 · 1,176 30-day fills |
|---|---|
| Patients | 97 |
| Total drug cost | $2,488,657 |
| Generic share | 84% of claims |
Education and affiliations
| Medical school | Yale University School of Medicine |
|---|---|
| Graduation year | 1988 |
| Medicare specialty | Hematology/Oncology |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- City of Hope Medical Group of Illinois PLLCZion, IL · 129 clinicians
Hospital affiliations
- Midwestern Region Med Center, IncZion, IL
- The University of Chicago Medical CenterChicago, IL
Industry payments (Open Payments)
- 2025$11,582 · 16 payments from 6 companies
- 2024$13,886 · 18 payments from 6 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Merck Sharp & Dohme LLC | $4,420 | 6 |
| Pfizer Inc. | $2,649 | 3 |
| Emd Serono, Inc. | $1,900 | 1 |
| Astrazeneca Uk Limited | $1,575 | 2 |
| Astrazeneca Ab | $700.00 | 1 |
What the 2025 payments were for
- Consulting Fee$11,095 · 12 payments
- Food and Beverage$487.13 · 4 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Internal Medicine, Hematology & Oncology providers in Zion
- 1043484736
- 1427096700
- 1831176007
- 1487761268
- 1134115769
- 1275030256
All Internal Medicine, Hematology & Oncology providers in Illinois →