David L. Groteluschen, M.D.
NPI 1679538011ActiveIndividual· Internal Medicine, Medical Oncology· Green Bay, WI
Internal Medicine, Medical Oncology (M.D.) in Green Bay, Wisconsin, trained at University of Iowa, Rj & L Carver College of Medicine (class of 2001). Their prescriptions cost Medicare Part D more than their services did: $3,995,801 for 1,333 claims, against $51,973 paid for services in 2024.
Overview
| NPI | 1679538011 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Apr 19, 2006 |
| Last updated in NPPES | Dec 20, 2021 |
| Certified by provider | Dec 20, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Medical Oncology Primary | 207RX0202X | 44953 | WI |
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 (MI); Practitioner - Hematology/Oncology (WI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 222 |
|---|---|
| Services billed | 604 across 14 procedure codes |
| Paid by Medicare | $51,973 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,333 · 2,090 30-day fills |
|---|---|
| Patients | 314 |
| Total drug cost | $3,995,801 |
| Generic share | 75% of claims |
Education and affiliations
| Medical school | University of Iowa, Rj & L Carver College of Medicine |
|---|---|
| Graduation year | 2001 |
| Medicare specialty | Hematology/Oncology |
| Secondary specialties | Internal Medicine |
Medical groups
- Osf Multi-Specialty GroupMorton, IL · 2,114 clinicians
- St Vincent Hospital-Hospital Sisters-Third Order of St FrancisGreen Bay, WI · 603 clinicians
- Ascension Ne Wisconsin, IncAppleton, WI · 19 clinicians
Hospital affiliations
- Ascension Ne Wisconsin - St Elizabeth CampusAppleton, WI
- Door County Medical CenterSturgeon Bay, WI
- Osf St Francis Hospital and Medical GroupEscanaba, MI
- St Marys Hospital Medical CtrGreen Bay, WI
- St Vincent HospitalGreen Bay, WI
Other facilities
- Unity HospiceHospice · De Pere, WI
Industry payments (Open Payments)
None reported for 2025 or 2024.
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All Internal Medicine, Medical Oncology providers in Wisconsin →