Mark Roger Olsen, M.D.
NPI 1356382592ActiveIndividual· Internal Medicine, Hematology & Oncology· Tulsa, OK
Internal Medicine, Hematology & Oncology (M.D.) in Tulsa, Oklahoma, trained at University of Wisconsin School of Medicine (class of 1992). In 2024 Medicare paid $3,605,887 for 1,068 patients, and Part D covered 1,054 of their prescriptions, 79% of them generic. Daiichi Sankyo Inc. was the largest of 12 companies reporting payments in 2025, $568.69 in all, mostly food and beverage.
Overview
| NPI | 1356382592 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jun 9, 2006 |
| Last updated in NPPES | May 8, 2014 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Hematology & Oncology Primary | 207RH0003X | 20723 | OK |
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 - Medical Oncology (OK) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 1,068 |
|---|---|
| Services billed | 214,991 across 241 procedure codes |
| Paid by Medicare | $3,605,887 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,054 · 1,262 30-day fills |
|---|---|
| Patients | 199 |
| Total drug cost | $2,508,840 |
| Generic share | 79% of claims |
Education and affiliations
| Medical school | University of Wisconsin School of Medicine |
|---|---|
| Graduation year | 1992 |
| Medicare specialty | Medical Oncology |
| Secondary specialties | Hematology |
Medical group
- Oklahoma Cancer Specialists and Research Institute, LLCTulsa, OK · 47 clinicians
Hospital affiliations
- Ascension St John Medical CenterTulsa, OK
- Cherokee Nation W W Hastings Indian HospitalTahlequah, OK
- Saint Francis Hospital South, LLCTulsa, OK
- Saint Francis Hospital, IncTulsa, OK
Other facilities
- Ascension at Home - TulsaHome health agency · Tulsa, OK
Industry payments (Open Payments)
- 2025$568.69 · 27 payments from 12 companies
- 2024$543.63 · 28 payments from 17 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Daiichi Sankyo Inc. | $181.26 | 4 |
| Pfizer Inc. | $137.03 | 10 |
| Astrazeneca Pharmaceuticals LP | $64.67 | 3 |
| Beone Medicines USA, Inc. | $47.26 | 2 |
| Genzyme Corporation | $21.16 | 1 |
What the 2025 payments were for
- Food and Beverage$478.46 · 20 payments
- Education$90.23 · 7 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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