{"schema_version":"1","generated_at":"2026-10-28T10:38:30.281Z","data_as_of":null,"url":"https://www.findmykol.com/kol/william-breen","json_url":"https://www.findmykol.com/kol/william-breen/profile.json","record_kind":"basic","profile_kind":"clinical","person":{"slug":"william-breen","name":"William Breen","credential":"MD","specialty":"Radiation Oncology","specialty_raw":"Radiation Oncology","therapeutic_area":"Oncology","therapeutic_areas":["Oncology"],"city":"Rochester","state":"MN","region":{"label":"Midwest","url":"https://www.findmykol.com/region/midwest"}},"identifiers":{"npi":"1437683562"},"summary":"William Breen is an Oncology physician. ClinicalTrials.gov lists 3 registered studies matched to this name.","overview":null,"focus":{"indications":[],"research_topics":["Oncology"]},"scholarship":{"note":"Research metrics are not shown for this record: either no confident publication match for this name, or more than one clinician shares the matched author record."},"trials":{"count":3,"shown":3,"withheld":0,"matched_by":"investigator name, confirmed against institution and geography","rows":[{"nct":"NCT05917145","title":"ATM-Inhibitor WSD0628 in Combination With Radiation Therapy for Treatment of Recurrent High-Grade Glioma","phase":"PHASE1","status":"RECRUITING","role":"Overall official","sponsor":"Mayo Clinic","source_url":"https://clinicaltrials.gov/study/NCT05917145","trial_url":"https://www.findmykol.com/trial/NCT05917145"},{"nct":"NCT05781321","title":"Short Course Radiotherapy for the Treatment of Patients With Glioblastoma, SAGA Study","phase":"PHASE2","status":"ACTIVE_NOT_RECRUITING","role":"Overall official","sponsor":"Mayo Clinic","source_url":"https://clinicaltrials.gov/study/NCT05781321","trial_url":"https://www.findmykol.com/trial/NCT05781321"},{"nct":"NCT04926948","title":"Stereotactic Body Radiation Therapy With Immunotherapy for the Treatment of Mesothelioma","phase":"PHASE1","status":"COMPLETED","role":"Overall official","sponsor":"Mayo Clinic","source_url":"https://clinicaltrials.gov/study/NCT04926948","trial_url":"https://www.findmykol.com/trial/NCT04926948"}],"source":"trials"},"payments":{"company_count":1,"program_years":{"first":2021,"last":null},"rows_total":1,"shown":1,"withheld":0,"rows":[{"payer":"Telix Pharmaceuticals","program_year":2023,"amount_usd":118.93,"payment_count":1,"source_url":"https://openpaymentsdata.cms.gov/search?query=1437683562"}],"record_url":"https://openpaymentsdata.cms.gov/search?query=1437683562","source":"payments"},"contact":{"address_1":"200 1ST ST SW","city":"Rochester","state":"MN","zip":"55905","phone":"507-284-2511","source_url":"https://npiregistry.cms.hhs.gov/provider-view/1437683562","source":"identity"},"similar":[{"name":"Carl June","slug":"carl-june","institution":"University of Pennsylvania","specialty":"Medical Oncology","url":"https://www.findmykol.com/kol/carl-june","json_url":"https://www.findmykol.com/kol/carl-june/profile.json"},{"name":"Rainer Storb","slug":"rainer-storb","institution":"University of Washington","specialty":"Hematology / Oncology","url":"https://www.findmykol.com/kol/rainer-storb","json_url":"https://www.findmykol.com/kol/rainer-storb/profile.json"},{"name":"Christina Fitzmaurice","slug":"christina-fitzmaurice","specialty":"Hematology / Oncology","url":"https://www.findmykol.com/kol/christina-fitzmaurice","json_url":"https://www.findmykol.com/kol/christina-fitzmaurice/profile.json"},{"name":"Larry Norton","slug":"larry-norton","institution":"Memorial Sloan Kettering Cancer Center","specialty":"Medical Oncology","url":"https://www.findmykol.com/kol/larry-norton","json_url":"https://www.findmykol.com/kol/larry-norton/profile.json"}],"coverage":{"note":"A basic record from the physician directory. Sections absent here were not yet checked for this person, so absence means not yet looked, never none found.","not_yet_checked":["funding","congress","network","presence","recognition"]},"not_included":{"note":"This document is the public layer: neutral facts cited to their source. Judgments (influence tier, archetype, trajectory commentary) and the itemized rows past each section's public teaser are account features and are not served here or to crawlers.","withheld_rows":{}},"sources":{"identity":{"name":"NPPES (CMS)","url":"https://npiregistry.cms.hhs.gov","provides":"Identity, specialty and practice location for every U.S. clinician","coverage":"Practice location (not mailing) from the NPPES record","record_last_updated":"2025-12-10","provider_certified":"2025-12-10","collected_at":"2026-10-27T00:00:00.000Z"},"trials":{"name":"ClinicalTrials.gov","url":"https://clinicaltrials.gov","provides":"Investigator roles on registered clinical studies"},"payments":{"name":"CMS Open Payments","url":"https://openpaymentsdata.cms.gov","provides":"Industry payments reported to CMS, by company and program year","disclaimer":"Payments are publicly reported to CMS. Their existence does not imply wrongdoing; CMS does not interpret these data.","coverage":"Program years 2021 onward"}},"methodology_url":"https://www.findmykol.com/about#methodology"}