InterSystems IRIS for Health and HealthShare are deployed across many of New York City's leading health systems as the integration and interoperability backbone. From large academic medical centers to regional health information exchanges, IRIS powers the HL7 interfaces, FHIR APIs, and clinical data repositories that keep NYC's healthcare ecosystem connected. Zerosums Technologies provides InterSystems IRIS consulting tailored to New York City's healthcare environment. Our IRIS engineers have deep expertise in HealthShare Health Connect, IRIS for Health interoperability platform, Ensemble production management, and the InterSystems ObjectScript development environment. We implement new IRIS productions, optimize existing ones, migrate from Ensemble to IRIS, and provide ongoing production support. For NYC health systems running HealthShare Health Connect, we build and maintain the HL7 v2 message routing, transformation, and routing workflows that connect EHRs, labs, imaging systems, and health information exchanges. We optimize message throughput, reduce error rates, implement monitoring dashboards, and develop custom transformation routines using ObjectScript and InterSystems DTL. We also support NYC organizations using IRIS as a FHIR server — configuring IRIS FHIR endpoints, implementing SMART on FHIR authorization, and building population health and analytics applications on top of the IRIS data platform.