Gary L. Larson, M.D.
NPI 1578599304ActiveIndividual· Radiology, Radiation Oncology· Oklahoma City, OK
Radiology, Radiation Oncology (M.D.) in Oklahoma City, Oklahoma, trained at University of Oklahoma College of Medicine (class of 1981). 279 Medicare patients in 2024, $90,324 paid; nearly all of their 200 Part D prescriptions were generic (94%). Galvanize Therapeutics, Inc was the largest of 2 companies reporting payments in 2025, $219.83 in all, mostly food and beverage.
Overview
| NPI | 1578599304 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jun 23, 2006 |
| Last updated in NPPES | May 21, 2024 |
| Certified by provider | May 21, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Radiology, Radiation Oncology Primary | 2085R0001X | 13856 | OK |
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 - Radiation Oncology (OK) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 279 |
|---|---|
| Services billed | 1,544 across 29 procedure codes |
| Paid by Medicare | $90,324 |
Part D prescriptions in 2024
| Prescriptions (claims) | 200 · 245 30-day fills |
|---|---|
| Patients | 57 |
| Total drug cost | $5,865 |
| Generic share | 94% of claims |
Education and affiliations
| Medical school | University of Oklahoma College of Medicine |
|---|---|
| Graduation year | 1981 |
| Medicare specialty | Radiation Oncology |
Medical group
- Radiation Medicine Associates, P.C.Oklahoma City, OK · 6 clinicians
Hospital affiliations
- Integris Baptist Medical Center, IncOklahoma City, OK
- Integris Health Enid HospitalEnid, OK
- Integris Southwest Medical CenterOklahoma City, OK
- St Mary's Regional Medical CenterEnid, OK
Industry payments (Open Payments)
- 2025$219.83 · 2 payments from 2 companies
- 2024$1,736 · 11 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Galvanize Therapeutics, Inc | $176.58 | 1 |
| Astrazeneca Pharmaceuticals LP | $43.25 | 1 |
What the 2025 payments were for
- Food and Beverage$176.58 · 1 payment
- Education$43.25 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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