Radiation Oncology in Arizona
188 licensed radiation oncologists practicing in Arizona across 46 cities.
This page republishes public records from the federal NPI Registry, which every licensed U.S. healthcare provider is required to maintain. These are federal-agency records, not a directory we compile.
Source: NPI Registry · last checked
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Click a city to filter the 50 providers shown below. Arizona has providers in 46 cities total — search the full NPI Registry for cities not shown here.
NPI Registry records — Radiation Oncology in Arizona
32 of 50 shown have disclosed payments in CMS Open Payments (2024)
Showing 50 of 188 federal NPI records, alphabetical by last name. Contact details come directly from the NPI Registry — verify currency with the provider's office. Pharma / device payment disclosures from CMS Open Payments are shown where the physician appears in that federal database.
Ayad K Agha, DO
3120 Willow Creek Rd Unit 100
Prescott, AZ 86301 · (480) 750-8130
License: 4341 (AZ)
In 2024, $787 was disclosed to this physician across 32 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($787).
Largest single payer: Medtronic, Inc. ($218).
In 2024, $219 was disclosed to this physician across 9 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($185) and education materials ($34).
Largest single payer: AbbVie Inc. ($64).
In 2024, $3,311 was disclosed to this physician across 137 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($3,311).
Largest single payer: AstraZeneca Pharmaceuticals LP ($295).
Justin Douglas Anderson, MD
4003 Kresge Way Ste 115
Louisville, KY 40207 · (502) 897-8163
License: TP508 (KY)
In 2024, $1,556 was disclosed to this physician across 84 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($1,556).
Largest single payer: NOVARTIS PHARMACEUTICALS CORPORATION ($285).
Hayden Anthony Ansinelli, MD
1845 W Orange Grove Rd Bldg 1
Tucson, AZ 85704 · (352) 401-8311
License: 63268 (AZ)
In 2024, $625 was disclosed to this physician across 23 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($625).
Largest single payer: Merck Sharp & Dohme LLC ($246).
Silvio Antonio Aristizabal, MD
1620 W Saint Marys Rd
Tucson, AZ 85745 · (520) 791-7996
License: 8043 (AZ)
Sammy Mohamed Ashouri, MD
300 Pasteur Dr Rm H1330
Stanford, CA 94305 · (650) 725-1812
License: A160913 (CA)
In 2024, $108 was disclosed to this physician across 1 transaction by pharmaceutical or medical-device companies.
Mostly entertainment ($108).
Largest single payer: Medtronic, Inc. ($108).
In 2023, $232 was disclosed to this physician across 3 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($232).
Dolores Durr Basden, MD
2625 N Craycroft Rd Ste 100
Tucson, AZ 85712 · (520) 324-4214
License: 26193 (AZ)
In 2024, $253 was disclosed to this physician across 7 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($253).
Largest single payer: AstraZeneca Pharmaceuticals LP ($131).
David C Beyer, MD
3700 W State Route 89a, Verde Valley Medical Center - Sedona
Sedona, AZ 86336 · (928) 204-4160
License: 12193 (AZ)
In 2024, $1,500 was disclosed to this physician across 6 transactions by pharmaceutical or medical-device companies.
Mostly charitable contributions ($1,050) and entertainment ($450).
Largest single payer: AstraZeneca Pharmaceuticals LP ($1,050).
In 2024, $3,051 was disclosed to this physician across 131 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($3,051).
Largest single payer: NOVARTIS PHARMACEUTICALS CORPORATION ($354).
In 2024, $10,346 was disclosed to this physician across 39 transactions by pharmaceutical or medical-device companies.
Mostly stock or ownership interest ($6,900) and entertainment ($3,446).
Largest single payer: Bard Peripheral Vascular, Inc. ($7,459).
Christopher A Biggs, MD
1916 W Bethany Home Rd Ste 100
Phoenix, AZ 85015 · (602) 274-4484
License: 31146 (AZ)
In 2024, $202 was disclosed to this physician across 5 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($202).
Largest single payer: Siemens Medical Solutions USA, Inc. ($136).
Yerko O Borghero, MD
2940 E Banner Gateway Dr, Suite 450
Gilbert, AZ 85234 · (480) 256-3676
License: 49082 (AZ)
In 2024, $242 was disclosed to this physician across 3 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($242).
Largest single payer: Boston Scientific Corporation ($125).
David G Brachman, MD
350 W Thomas Rd, St Joes Rad/onc Dept
Phoenix, AZ 85013 · (602) 406-3170
License: 23852 (AZ)
Charles Eugene Bruso, MD
2755 Silver Creek Rd, Suite 115
Bullhead City, AZ 86442 · (928) 763-3600
License: 23430 (AZ)
Matthew D Callister, MD
2940 E Banner Gateway Dr, Suite 450
Gilbert, AZ 85234 · (480) 256-6444
License: 32639 (AZ)
Thomas P Canty, MD
20601 N 19th Ave, Suite 115
Phoenix, AZ 85027 · (602) 557-0050
License: 18671 (AZ)
Daniel D Chamberlain, MD
200 1st St Sw
Rochester, MN 55905 · (507) 284-2511
License: 4301116479 (MI)
Roscoe Ho-Keung Chan, MD, FRCPC
1100 Gail Gardner Way
Prescott, AZ 86305 · (928) 776-1040
License: 37785 (AZ)
In 2024, $135 was disclosed to this physician across 4 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($135).
Largest single payer: Teleflex LLC ($81).
In 2023, $125 was disclosed to this physician across 1 transaction by pharmaceutical or medical-device companies.
Mostly entertainment ($125).
In 2024, $293 was disclosed to this physician across 6 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($293).
Largest single payer: Progenics Pharmaceuticals, Inc. ($151).
Rezwan Hossain Chowdhury, MD
7695 S Research Dr
Tempe, AZ 85284 · (480) 256-1664
License: 42880 (AZ)
In 2024, $423 was disclosed to this physician across 18 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($423).
Largest single payer: AstraZeneca Pharmaceuticals LP ($76).
Michael Thayer Christensen, MD
3530 S Val Vista Dr # C104
Gilbert, AZ 85297 · (480) 791-1400
License: 25678 (NV)
In 2024, $155 was disclosed to this physician across 1 transaction by pharmaceutical or medical-device companies.
Mostly entertainment ($155).
Largest single payer: Novocure Inc. ($155).
Ravinder Clayton, MD
Banner Boswell Medical Center, 10401 W. Thunderbird Blvd
Sun City, AZ 85351 · (480) 256-6444
License: MD.33756 (AL)
In 2024, $1,279 was disclosed to this physician across 9 transactions by pharmaceutical or medical-device companies.
Mostly meals and beverages ($988) and entertainment ($291).
Largest single payer: Siemens Medical Solutions USA, Inc. ($743).
Marilyn Kay Croghan, MD
2625 N Craycroft Rd, Ste 100
Tucson, AZ 85712 · (520) 324-4214
License: 15650 (AZ)
Neil Mark D'Souza
13555 W McDowell Rd Ste 105&206
Goodyear, AZ 85395 · (623) 487-4822
License: 67267 (AZ)
In 2024, $3,303 was disclosed to this physician across 104 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($3,303).
Largest single payer: AstraZeneca Pharmaceuticals LP ($577).
In 2024, $1,810 was disclosed to this physician across 4 transactions by pharmaceutical or medical-device companies.
Mostly charitable contributions ($1,625) and entertainment ($185).
Largest single payer: Siemens Medical Solutions USA, Inc. ($1,766).
Donn Marshall Davis, MD
1100 Gail Gardner Way
Prescott, AZ 86305 · (928) 776-1040
License: 58993 (AZ)
In 2023, $88 was disclosed to this physician across 4 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($88).
Samuel Evan Day, MD, PHD
3700 E Fort Lowell Rd Ste 130
Tucson, AZ 85716 · (520) 881-0631
License: 58485 (AZ)
In 2024, $871 was disclosed to this physician across 38 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($871).
Largest single payer: Merck Sharp & Dohme LLC ($166).
Aidnag Z. Diaz, MD
350 W Thomas Rd, Attn: Barrow Radiation Oncology
Phoenix, AZ 85013 · (602) 406-6761
License: 58024 (AZ)
In 2023, $68 was disclosed to this physician across 1 transaction by pharmaceutical or medical-device companies.
Mostly entertainment ($68).
Ammoren Edward Dohm, MD
8880 E Desert Cove Ave
Scottsdale, AZ 85260 · (480) 314-6670
License: 73542 (AZ)
In 2024, $774 was disclosed to this physician across 31 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($774).
Largest single payer: NOVARTIS PHARMACEUTICALS CORPORATION ($174).
Nagy Elsayyad, MBBCH(MD)
3838 N Campbell Ave Bldg 2
Tucson, AZ 85719 · (520) 694-1183
License: ME92589 (FL)
In 2024, $194 was disclosed to this physician across 3 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($194).
Largest single payer: DePuy Synthes Sales Inc. ($126).
William Bruce Ethridge, MD
1951 W 25th Street, Ste F
Yuma, AZ 85364 · (928) 314-1174
License: 12956 (AZ)
In 2024, $237 was disclosed to this physician across 2 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($237).
Largest single payer: Elekta, Inc. ($125).
In 2024, $1,028 was disclosed to this physician across 34 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($1,028).
Largest single payer: IZI Medical Products, LLC ($280).
In 2024, $300 was disclosed to this physician across 7 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($300).
Largest single payer: Siemens Medical Solutions USA, Inc. ($145).
Michael Anthony Garcia, MD
10424 W Santa Fe Dr
Sun City, AZ 85351 · (623) 832-3400
License: 55617 (AZ)
In 2024, $122 was disclosed to this physician across 1 transaction by pharmaceutical or medical-device companies.
Mostly entertainment ($122).
Largest single payer: AstraZeneca Pharmaceuticals LP ($122).
In 2024, $1,334 was disclosed to this physician across 59 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($1,334).
Largest single payer: Pfizer Inc. ($165).
Victor Jose Gonzalez, MD
1501 N Campbell Ave, Dept. of Radiation Oncology
Tucson, AZ 85724 · (520) 694-7236
License: 43282 (AZ)
In 2024, $93 was disclosed to this physician across 4 transactions by pharmaceutical or medical-device companies.
Mostly entertainment ($93).
Largest single payer: AbbVie Inc. ($29).
Showing 50 of 188. Search all on NPI Registry →
Payment totals shown for the latest published program year (2024). Presence of disclosed payments is not, on its own, a conflict of interest. Physicians dispute records directly with CMS (dispute process). How we show this.
Open Payments figures as displayed on . Corrections flow from the manufacturer through CMS and are adopted on our next refresh.
What this page is: a republication of public federal NPI Registry records, filtered to the radiation oncology taxonomy. It is not a directory we curate, and inclusion is automatic based on each provider's own NPI filing with CMS. Providers who believe their NPI record is inaccurate should update it directly with CMS at npiregistry.cms.hhs.gov; our next refresh adopts the corrected federal record.
Practice info disclaimer: Provider addresses and phone numbers come from the NPI Registry, which providers update at their discretion. Always call ahead to confirm the provider is currently accepting patients and is at the listed address.
Medical disclaimer: This page is not a quality ranking and does not constitute medical advice or endorsement. Choose a provider in consultation with your primary care physician or care team.
Source: NPI Registry (taxonomy: Radiation Oncology) · Last checked: 2026-04-20