| MedCom | MedCom (Administrative Coordinator) | DK |
| HL7 | HL7 International Foundation (Scientific Coordinator) | BE |
| NEN/CEN | CEN Technical Committee 251 Health Informatics, represented by Dutch Standards Organization NEN, which provides the CEN/TC251 secreteriat. STICHTING NEDERLANDS NORMALISATIE – INSTITUUT | NL |
| IHE | INTEGRATING THE HEALTHCARE ENTERPRISE – EUROPE AISBL | BE |
| I~HD | The European Institute for Innovation through Health Data | BE |
| empirica | empirica Gesellschaft für Kommunikations- und Technologieforschung mbH | DE |
| GNOMON | GNOMON Informatics SA | GR |
| Phast | RESEAU PHAST ASSOCIATION | FR |
| SRDC | SRDC YAZILIM ARASTIRMA VE GELISTIRME VE DANISMANLIK TICARET ANONIM SIRKETI | TR |
| OFFIS | OFFIS EV | DE |
| LISPA | LOMBARDIA INFORMATICA SPA | IT |
| THL | TERVEYDEN JA HYVINVOINNIN LAITOS | FI |
| eSANTE | AGENCE eSANTE | LU |
| TicSalut | FUNDACIO TICSALUT SOCIAL | ES |
| SPMS | SPMS – SERVICOS PARTILHADOS DO MINISTERIO DA SAUDE EPE | PT |
| ECHAlliance | Connected Health Alliance CIC | UK |
| ADI | Advanced Digital Innovation LTD | UK |
| Reliant Med Grp | Reliant Medical Group, Inc. | US |
| Lantana | LANTANA CONSULTING GROUP, LLC | US |
| HSPC | Healthcare Services Platform Consortium | US |
| SmartPHR | PROSOCIAL APPLICATIONS INC | US |
| Sequoia | Healtheway, Inc. DBA The Sequoia Project | US |
| KP | KAISER FOUNDATION HOSPITALS | US |
Trillium II 