Demet Gokalp Yasar, M.D.
NPI 1437381191ActiveIndividual· Internal Medicine, Hematology & Oncology· Green Bay, WI
Internal Medicine, Hematology & Oncology (M.D.) with Aurora Medical Group, Inc. and 1 other group, practicing in Green Bay, Wisconsin. Their prescriptions cost Medicare Part D more than their services did: $4,284,208 for 1,687 claims, against $92,320 paid for services in 2024. Celgene Corporation was the largest of 2 companies reporting payments in 2025, $229.99 in all, mostly food and beverage. Lists Aurora Baycare Medical Ctr and 2 other hospitals as hospital affiliations.
Overview
| NPI | 1437381191 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Aug 13, 2009 |
| Last updated in NPPES | Oct 17, 2024 |
| Certified by provider | Oct 17, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Hematology & Oncology Primary | 207RH0003X | 63528-20 | WI |
| Internal Medicine | 207R00000X | 125.055720 | 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 (WI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 450 |
|---|---|
| Services billed | 1,399 across 19 procedure codes |
| Paid by Medicare | $92,320 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,687 · 2,261 30-day fills |
|---|---|
| Patients | 298 |
| Total drug cost | $4,284,208 |
| Generic share | 71% of claims |
Education and affiliations
| Graduation year | 1997 |
|---|---|
| Medicare specialty | Hematology/Oncology |
| Telehealth | Offers telehealth |
Medical groups
- Aurora Medical Group, Inc.Milwaukee, WI · 3,813 clinicians
- Baycare Aurora LLCGreen Bay, WI · 194 clinicians
Hospital affiliations
- Aurora Baycare Medical CtrGreen Bay, WI
- Aurora Medical Center Bay AreaMarinette, WI
- Marshfield Medical Center - MinocquaMinocqua, WI
Other facilities
- Unity HospiceHospice · De Pere, WI
Industry payments (Open Payments)
- 2025$229.99 · 2 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Celgene Corporation | $204.29 | 1 |
| Merck Sharp & Dohme LLC | $25.70 | 1 |
What the 2025 payments were for
- Food and Beverage$204.29 · 1 payment
- Education$25.70 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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