California's healthcare ecosystem is one of the most complex and interconnected in the world. Integrated delivery networks, independent hospitals, multi-specialty medical groups, independent labs, imaging centers, pharmacies, and public health agencies all need to exchange clinical data reliably — patient demographics, orders, results, clinical documents, and care summaries flowing between systems in real time or near-real time. HL7 messaging remains the backbone of this clinical data exchange, and getting it right requires deep expertise.\n\nZerosums Technology provides HL7 integration services specifically for California healthcare organizations. Our integration engineers are experienced with HL7 v2.x message development and troubleshooting across all common message types — ADT, ORU, ORM, SIU, MDM, DFT, and more. We work within major integration engines including Mirth Connect, InterSystems HealthShare, Rhapsody, Infor Cloverleaf, and others to build, deploy, and maintain interfaces that move clinical data reliably between systems.\n\nCalifornia's health information exchange landscape adds additional complexity. The California Health and Human Services Agency's data exchange initiatives, participation in eHealth Exchange and the Carequality framework, and the proliferation of FHIR-based APIs alongside legacy HL7 v2 interfaces mean that California integration engineers must be fluent in both traditional and modern interoperability standards. Our team bridges the old and new, supporting California clients in both maintaining existing HL7 v2 interfaces and building new FHIR-based connections.\n\nFor California's Medi-Cal managed care plans and their provider networks, we support the specific EDI and clinical data exchange requirements of California's Medi-Cal program. We also assist California healthcare organizations with the interoperability compliance requirements of the CMS Interoperability and Patient Access Final Rule and the ONC 21st Century Cures Act Information Blocking provisions.