Gregory A. Maggass, MD
NPI 1124093539ActiveIndividual· Radiology, Radiation Oncology· Scottsdale, AZ
Radiology, Radiation Oncology (MD) in Scottsdale, Arizona, trained at Medical College of Wisconsin (class of 1983). 233 Medicare patients in 2024, $1,460,862 paid; nearly all of their 237 Part D prescriptions were generic (97%). Novartis Pharmaceuticals Corporation was the largest of 36 companies reporting payments in 2025, $2,516 in all, mostly food and beverage.
Overview
| NPI | 1124093539 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Feb 20, 2006 |
| Last updated in NPPES | Aug 9, 2010 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Radiology, Radiation Oncology Primary | 2085R0001X | 17059 | AZ |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 4, 2026 | No match | — |
| New York OMIG · Nov 4, 2026 | No match | — |
| Ohio Medicaid · Nov 4, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 4, 2026 | No match | — |
| Washington HCA · Nov 4, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Radiation Oncology (AZ) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 233 |
|---|---|
| Services billed | 7,877 across 53 procedure codes |
| Paid by Medicare | $1,460,862 |
Part D prescriptions in 2024
| Prescriptions (claims) | 237 · 372 30-day fills |
|---|---|
| Patients | 99 |
| Total drug cost | $14,831 |
| Generic share | 97% of claims |
Education and affiliations
| Medical school | Medical College of Wisconsin |
|---|---|
| Graduation year | 1983 |
| Medicare specialty | Radiation Oncology |
Medical group
- Arizona Center for Hematology and Oncology PLCGoodyear, AZ · 61 clinicians
Industry payments (Open Payments)
- 2025$2,516 · 90 payments from 36 companies
- 2024$2,405 · 94 payments from 29 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Novartis Pharmaceuticals Corporation | $371.89 | 13 |
| Siemens Medical Solutions USA, Inc. | $241.78 | 3 |
| Astrazeneca Pharmaceuticals LP | $205.64 | 8 |
| Telix Pharmaceuticals | $158.08 | 2 |
| Janssen Biotech, Inc. | $139.89 | 7 |
What the 2025 payments were for
- Food and Beverage$2,516 · 90 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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