Quick answers
- Where does Gregory A. Maggass see patients?
- Medicare's clinician data lists 4 practice locations, including Scottsdale, AZ, Peoria, AZ and Tempe, AZ. Call before your visit to confirm the address.
- What is Gregory A. Maggass's specialty?
- Medicare lists Radiation Oncology as the primary specialty.
- Does Gregory A. Maggass accept Medicare assignment?
- Yes. Medicare's clinician data says Gregory A. Maggass accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for Gregory A. Maggass?
- (480) 278-8300, as listed in official Medicare / NPI Registry data.
- What is Gregory A. Maggass's NPI number?
- 1124093539. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where Gregory A. Maggass is enrolled with Medicare (CMS data updated 2026-10-02).
- 10460 N 92nd St, Suite 101Scottsdale, AZ 85258 (480) 278‑8300
- 14155 N 83rd Ave, Suite 127Peoria, AZ 85381 (623) 773‑2873
- 7337 E 2nd StScottsdale, AZ 85251 (480) 278‑8300
- 7695 S Research DrTempe, AZ 85284 (480) 278‑8300
Group practices
Medicare enrollment lists Gregory A. Maggass as a member of this group (CMS data updated 2026-10-02).
- Arizona Center for Hematology and Oncology PLC61 clinicians in the group
Specialties
- Radiation Oncologyprimary
Other radiation oncologists in Scottsdale
Clinicians with the same Medicare primary specialty in Scottsdale, AZ — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Medical College Of Wisconsin |
| Graduation year | 1983 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1124093539 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians