Black Book polled users of 224 operations – public and private exchanges – and here are the vendors ranking first in their categories:

EHR / HIT-based HIE: Cerner
Government Payer and Commercial Insurer Centric HIEs: Orion Health
Core Private Enterprise HIE Solutions: Aetna Medicity
Core Public HIEs Systems: Intersystems

Other vendors that scored well in specific key HIE performance indicators were: Alere Wellogic, Availity, Caradigm, CTG, dbMotion Allscripts, Epic Systems, Greenway, GSI Healthcare, HealthUnity, ICA, Infor (Lawson), McKesson RelayHealth, Medecision, Optuminsight, QSI Mirth NextGen, Sandlot, and Siemens,” according to Black Book.