John Charles Michalak, M.D.
NPI 1497727663ActiveIndividual· Internal Medicine, Hematology & Oncology· Sioux City, IA
Internal Medicine, Hematology & Oncology (M.D.) in Sioux City, Iowa, licensed in IA, with an NPI issued in February 2006. Part D covered 13 prescriptions written in 2024, 85% of them generic. Pfizer Inc. reported $24.59 in payments in 2024, mostly food and beverage.
Overview
| NPI | 1497727663 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Feb 2, 2006 |
| Last updated in NPPES | Jul 13, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Hematology & Oncology Primary | 207RH0003X | 21969 | IA |
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) | Not in the public enrollment file of Oct 1, 2026 |
|---|
Part D prescriptions in 2024
| Prescriptions (claims) | 13 · 13 30-day fills |
|---|---|
| Total drug cost | $14,951 |
| Generic share | 85% of claims |
Industry payments (Open Payments)
- 2024$24.59 · 1 payment from 1 company
Top paying companies in 2024
| Company | Amount | Payments |
|---|---|---|
| Pfizer Inc. | $24.59 | 1 |
What the 2024 payments were for
- Food and Beverage$24.59 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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