{"schema_version":"1","generated_at":"2026-11-13T03:05:22.528Z","data_as_of":null,"url":"https://www.findmykol.com/kol/bruce-leff","json_url":"https://www.findmykol.com/kol/bruce-leff/profile.json","record_kind":"basic","profile_kind":"clinical","person":{"slug":"bruce-leff","name":"Bruce Leff","credential":"MD","specialty":"Geriatric Medicine","specialty_raw":"Geriatric Medicine","therapeutic_area":"Primary Care","therapeutic_areas":["Primary Care"],"institution":"Johns Hopkins University","institution_url":"https://www.findmykol.com/institution/johns-hopkins-university-school-of-medicine","city":"Baltimore","state":"MD","region":{"label":"Northeast","url":"https://www.findmykol.com/region/northeast"}},"identifiers":{"npi":"1164466157","orcid":"0000-0003-1714-7458","openalex":"A5083477380"},"summary":"Bruce Leff is a Primary Care physician affiliated with Johns Hopkins University. OpenAlex indexes 303 publications with 11,300 citations (h-index 59); ClinicalTrials.gov lists 1 registered study matched to this name. 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Sections absent here were not yet checked for this person, so absence means not yet looked, never none found.","not_yet_checked":["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":{"orcid":{"name":"ORCID","url":"https://orcid.org","provides":"The verified researcher identity that anchors authorship"},"identity":{"name":"NPPES (CMS)","url":"https://npiregistry.cms.hhs.gov","provides":"Identity, specialty and practice location for every U.S. clinician"},"works":{"name":"OpenAlex","url":"https://openalex.org","provides":"Citations, h-index, research topics, most-cited works and congress abstracts"},"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"},"grants":{"name":"NIH RePORTER","url":"https://reporter.nih.gov","provides":"Federally funded research awards, by fiscal year"}},"methodology_url":"https://www.findmykol.com/about#methodology"}