Gregory A. Maggass, MD
Radiation Oncology Physician · Scottsdale, AZ
Gregory A. Maggass, MD is a radiation oncology physician with a practice address in Scottsdale, Arizona, and NPI 1124093539, issued on Feb 20, 2006. Check the license (Arizona 17059, as entered in NPPES) on the Arizona Medical Board; the Medicare figures below come from public CMS files.
- Name
- Gregory A. Maggass
- Credential
- MD
- Primary taxonomy
- Radiation Oncology Physician 2085R0001X
- License number
- 17059 AZ
Self-reported in NPPES; status is on the state search - Practice location
- 9055 E Del Camino Dr, Scottsdale, AZ 85258
- Phone
- (480) 922-4600
- Enumerated
- Feb 20, 2006
- Record last updated
- Aug 9, 2010 (not updated in 16 years: call before relying on the address or phone)
- Fax
- (480) 922-5231
- Medicare enrollment
- Enrolled (PECOS I20090108000695); accepts Medicare assignment
- Medical or professional school
- Medical College Of Wisconsin, 1983
- Entity
- Type 1 · individual
8 nearest radiation oncology physician records → All 156 in Arizona → Look up another NPI →
Also registered at 9055 E Del Camino Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Michael Gordon, MDHematology & Oncology Physician1114929114
- Scott Tannehill, MDRadiation Oncology Physician1902897440
Verify Gregory A. Maggass in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersArizona Medical Board
Search for license 17059Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
77% more Medicare Part D claims than the average radiation oncology physician in 2024
237 Medicare Part D claims for 99 beneficiaries, against an average of 134 among the 4,851 providers of this specialty who prescribed in Part D.
Most prescribed
- Alfuzosin Hcl Er74 claims
- Tamsulosin Hcl59 claims
- Pilocarpine Hcl31 claims
- Ondansetron Odt16 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $2,404.96
94 payments; by number, the most common kind was food and beverage; the largest payer was Pfizer Inc. The 3,275 providers of this specialty with any payment received $1,897.85 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Arizona Center For Hematology And Oncology PLCScottsdale, AZ
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gregory A. Maggass among 156 radiation oncology physician records in Arizona
Gregory A. Maggass, MD is one of 156 radiation oncology physician records with a practice address in Arizona. 84% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 15% of them.
- NPI issued2006 · 15% of these records are older, 51% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 74% of these records are
- Graduated1983 · median 2003 among the 115 with a school on file
- Record last updated2010 · 46% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2085R0001X and a Arizona practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Radiation Oncology Physician providers in Arizona
There are 156 radiation oncology physician records in Arizona.
All 156 in Arizona → Every provider in Scottsdale → Radiation Oncology Physician nationwide →
The 8 radiation oncology physician records with the nearest ZIP codes
- Luci Chen, M.D.Scottsdale, AZ 852581235103839
- Apar Gupta, M.D.Scottsdale, AZ 852581407237845
- Robert Kuske, MDScottsdale, AZ 852581447226766
- Anushka Patel, M.D.Scottsdale, AZ 852581831308600
- Scott Tannehill, MDScottsdale, AZ 852581902897440
- Farley Yang, MDScottsdale, AZ 852581821052069
- Jonathan Ashman, MDScottsdale, AZ 852591659337566
- Sameer Keole, MDScottsdale, AZ 852591235194952
Common questions
What is Gregory A. Maggass, MD's NPI number?
Gregory A. Maggass, MD's National Provider Identifier (NPI) is 1124093539, issued on Feb 20, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Gregory A. Maggass, MD located?
The NPPES record lists a practice address at 9055 E Del Camino Dr, Scottsdale, AZ, 85258. Phone: (480) 922-4600. Providers update this record themselves, so call before visiting.
How can I verify Gregory A. Maggass, MD's license?
NPPES lists Arizona license number 17059, as entered by the provider. Search the Arizona Medical Board at https://www.azmd.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Gregory A. Maggass, MD prescribe under Medicare Part D?
In 2024, Gregory A. Maggass, MD had 237 Medicare Part D claims for 99 beneficiaries; the average among radiation oncology physician prescribers was 134. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.