Robert J. Gunderson, D.O.
NPI 1598748907ActiveIndividual· Orthopaedic Surgery· Chickasha, OK
Orthopaedic Surgery (D.O.) in Chickasha, Oklahoma, trained at Oklahoma State University College of Osteopathic Medicine (class of 1991). 276 Medicare patients in 2024, $226,499 paid; nearly all of their 748 Part D prescriptions were generic (99%). Vertex Pharmaceuticals Incorporated was the largest of 9 companies reporting payments in 2025, $255.12 in all, mostly food and beverage.
Overview
| NPI | 1598748907 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | D.O. |
| Sole proprietor | No |
| NPI issued | Nov 21, 2005 |
| Last updated in NPPES | Feb 13, 2026 |
| Certified by provider | Feb 13, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Orthopaedic Surgery Primary | 207X00000X | 3030 | 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 - Orthopedic Surgery (OK); Practitioner - Orthopedic Surgery (TX) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 276 |
|---|---|
| Services billed | 1,412 across 115 procedure codes |
| Paid by Medicare | $226,499 |
Part D prescriptions in 2024
| Prescriptions (claims) | 748 · 768 30-day fills |
|---|---|
| Patients | 182 |
| Total drug cost | $9,544 |
| Generic share | 99% of claims |
Education and affiliations
| Medical school | Oklahoma State University College of Osteopathic Medicine |
|---|---|
| Graduation year | 1991 |
| Medicare specialty | Orthopedic Surgery |
Medical group
- Grady Memorial HospitalChickasha, OK · 47 clinicians
Hospital affiliations
- Grady Memorial HospitalChickasha, OK
- The Physicians' Hospital in AnadarkoAnadarko, OK
Other facilities
- Complete Home Health of Tishomingo LLCHome health agency · Tishomingo, OK
- Lifeline Home Health Care, IncHome health agency · Chickasha, OK
Industry payments (Open Payments)
- 2025$255.12 · 11 payments from 9 companies
- 2024$135.02 · 5 payments from 5 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Vertex Pharmaceuticals Incorporated | $47.20 | 2 |
| Acera Surgical, Inc. | $36.06 | 1 |
| P Bar Medical LLC | $32.14 | 2 |
| Medtronic, Inc. | $30.81 | 1 |
| Organogenesis Inc. | $30.66 | 1 |
What the 2025 payments were for
- Food and Beverage$255.12 · 11 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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