Ioannis Karkatzounis, MD
NPI 1639335235ActiveIndividual· Hospitalist· Oshkosh, WI
Hospitalist (MD) with Osf Multi-Specialty Group and 5 other groups, practicing in Oshkosh, Wisconsin. 386 Medicare patients in 2024, $55,178 paid; nearly all of their 400 Part D prescriptions were generic (92%). Harmony Biosciences LLC was the largest of 7 companies reporting payments in 2024, $292.60 in all, mostly food and beverage. Lists Deaconess Illinois Crossroads and 4 other hospitals as hospital affiliations.
Overview
| NPI | 1639335235 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | Yes |
| NPI issued | Aug 3, 2008 |
| Last updated in NPPES | Sep 26, 2024 |
| Certified by provider | Sep 26, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Hospitalist Primary | 208M00000X | 036-120385 | IL |
| Internal Medicine | 207R00000X | 2960 | WI |
| Internal Medicine | 207R00000X | 036120385 | IL |
| Hospitalist | 208M00000X | 2960 | WI |
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 - Hospitalist (IA); Practitioner - Hospitalist (IL); Practitioner - Internal Medicine (MI); Practitioner - Hospitalist (WI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 386 |
|---|---|
| Services billed | 946 across 9 procedure codes |
| Paid by Medicare | $55,178 |
Part D prescriptions in 2024
| Prescriptions (claims) | 400 · 447 30-day fills |
|---|---|
| Patients | 188 |
| Total drug cost | $17,331 |
| Generic share | 92% of claims |
Education and affiliations
| Graduation year | 1999 |
|---|---|
| Medicare specialty | Internal Medicine |
Medical groups
- Osf Multi-Specialty GroupMorton, IL · 2,114 clinicians
- 24 on Physicians PCHerrin, IL · 272 clinicians
- Genesis Health SystemDavenport, IA · 261 clinicians
- Sound Physicians of Illinois LLCLake Saint Louis, MO · 193 clinicians
- Grand Traverse Physician Services PCTraverse City, MI · 113 clinicians
- Trinity Medical Staffing LLCWatseka, IL · 36 clinicians
Hospital affiliations
- Deaconess Illinois CrossroadsMount Vernon, IL
- Genesis Medical Center-DavenportDavenport, IA
- Herrin HospitalHerrin, IL
- Memorial Hospital of CarbondaleCarbondale, IL
- Osf Sacred Heart Medical CenterDanville, IL
Industry payments (Open Payments)
- 2024$292.60 · 7 payments from 7 companies
Top paying companies in 2024
| Company | Amount | Payments |
|---|---|---|
| Harmony Biosciences LLC | $179.21 | 1 |
| Inari Medical, Inc. | $28.21 | 1 |
| Astrazeneca Pharmaceuticals LP | $18.61 | 1 |
| Abbvie Inc. | $18.61 | 1 |
| Pfizer Inc. | $17.17 | 1 |
What the 2024 payments were for
- Food and Beverage$292.60 · 7 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 19 hospitalists in Oshkosh · All hospitalists in Wisconsin