ABlockchain-BasedApproachtoHealthInformationExchangeNetworksKevinPeterson,RammohanDeeduvanu,PradipKanjamala,andKellyBolesMayoClinicAbstractSharinghealthcaredatabetweeninstitutionsischallenging.Heterogeneousdatastructuresmayprecludecompatibility,whiledisparateuseofhealthcareterminologylimitsdatacomprehension.Evenifstructureandsemanticscouldbeagreedupon,bothsecurityanddataconsistencyconcernsabound.Centralizeddatastoresandauthorityprovidersareattractivetargetsforcyberattack,andestablishingaconsistentviewofthepatientrecordacrossadatasharingnetworkisproblematic.InthisworkwepresentaBlockchain-basedapproachtosharingpatientdata.Thisapproachtradesasinglecentralizedsourceoftrustinfavorofnetworkconsensus,andpredicatesconsensusonproofofstructuralandsemanticinteroperability.1ProblemStatementCross-institutionalsharingofhealthcaredataisacomplexundertakingwithth