European
| Member type | Country | EQA Organization | Full Name | City | Web |
| Full | Austria | OEQUASTA | Österreichische Gesellschaft für Qualitätssicherung und Standardisierung medizinisch-diagnostischer Untersuchungen | Vienna | www.oequasta.at |
| Full | Belgium | Sciensano | Sciensano | Ixelles | |
| Full | Croatia | CROQALM | Croatian Centre for Quality Assessment in Laborartory Medicine | Zagreb | croqalm.hdmblm.hr |
| Full | Czech Republic | SEKK | -- | Pardubice | |
| Full | Denmark | DEKS | Danish Institute for External Quality Assurance for Laboratories in the Health Sector | Glostrup | |
| Full | France | ASQUALAB | Assurance Qualité des Laboratoires de Biologie Médicale | Paris | |
| Full | France | BIOLOGIE PROSPECTIVE | Biologie Prospective | Villers-lès-Nancy | |
| Full | France | CTCB | Centre Toulousain pour le Contrôle de qualité en Biologie clinique | Toulouse | |
| Full | France | PROBIOQUAL | Probioqual | Lyon | |
| Full | Germany | INSTAND e.V. | Instand e.V. Gesellschaft zur Förderung der Qualitätssicherung in medizinischen Laborratorien | Düsseldorf | |
| Full | Germany | RfB | Reference Institute for Bioanalytics | Bonn | |
| Full | Greece | ESEAP | Proficiency Testing Scheme for Clinical Laboratories | Athens | |
| Full | Hungary | QualiCont | QualiCont In Vitro Diagnostic Quality Control Nonprofit Ltd. | Szeged | |
| Full | Ireland | IEQAS | Irish External Quality Assessment Scheme | Dublin | |
| Full | Italy | -- | Azienda Ospedaliera di Padova | Padova | -- |
| Full | Italy | CRC Med Lab | Centro Regionale di Coordinamento della Medicina di Laboratorio - Ospedale Niguarda | Milano | www.qualitalaboratorilombardia.it/ |
| Full | Norway | -- | Norwegian EQA immunohematology | Oslo | -- |
| Full | Norway | NOKLUS | The Norwegian Organisation for Quality Improvement of Laboratory Examinations | Bergen | |
| Full | Portugal | PNAEQ | Instituto Nacional de Saúde Doutor Ricardo Jorge, Programa Nacional de Avaliação Externa da Qualidade | Lisbon |
www.insa.min-saude.pt/category/servicos/avaliacao-externa-da-qualidade |
| Full | Romania | CALILAB | Asociatia pentru Calitate in Laboratoare | Bucarest | |
| Full | Scotland | QCMD | Quality Control for Molecular Diagnostics | Glasgow | |
| Full | Slovenia | SNEQAS | Slovenian National External Quality Assessment Scheme | Ljubljana | |
| Full | Spain | SEMEDLAB | Sociedad Española de Medicina de Laboratorio | Madrid | |
| Full | Sweden | EQUALIS | -- | Uppsala | |
| Full | Switzerland | CSCQ | Quality Control Center Switzerland | Chêne-Bourg | |
| Full | Switzerland | MQ | Association for Medical Quality Control | Zürich | |
| Full | The Netherlands | ECAT | ECAT Foundation | Voorschoten | |
| Full | The Netherlands | SKML | Foundation for Quality Assessment in Medical Laboratories | Nijmegen | |
| Full | The Netherlands | MCA Laboratory | -- | Winterswijk |
-- |
| Full | Turkey | KBUDEK | External Quality Control Programs | Istanbul | |
| Full | Ukraine | NGO AQALM | Ukrainian Association for Quality Assurance in Laboratory Medicine | Kyiv | -- |
| Full | United Kingdom | DEQAS | Vitamin D External Quality Assessment Scheme | London | |
| Full | United Kingdom | EMQN CIC | The European Molecular Genetics Quality Network | Manchester | |
| Full | United Kingdom | UK NEQAS | UK NEQAS for Blood Coagulation | Sheffield | |
| Full | United Kingdom | UK NEQAS | UK NEQAS for Cardiac Markers | Glasgow | |
| Full | United Kingdom | UK NEQAS | UK NEQAS for Clinical Chemistry | Birmingham | |
| Full | United Kingdom | UK NEQAS | UK NEQAS for Haematology and Transfusion | Watford | |
| Full | United Kingdom | UK NEQAS | UK NEQAS for Immunology, Immunochemistry and Allergy | Sheffield | www.immqas.org.uk |
| Full | United Kingdom | UK NEQAS | UK NEQAS for Microbiology | London | |
| Full | United Kingdom | UK NEQAS | UK NEQAS for Peptide hormones | Edinburgh | |
| Full | United Kingdom | Weqas | -- | Cardiff |
Non-European
| Member type | Country | EQA Organization | Full Name | City | Web |
| Non-European | Australia | RCPAQAP | The Royal College of Pathologists of Australasia Quality Assurance Programs | Sydney | |
| Non-European | Brazil | Controllab | Controle de Qualidade para Laboratórios | Rio de Janeiro | controllab.com |
| Non-European | Brazil | PNCQ | Programa Nacional de Controle de Qualidade | Rio de Janeiro |
Associate members
| Member type | Country | EQA Organization | Full Name | City | Web |
| Associate | Finland | Aurevia Oy | -- | Helsinki | |
| Associate | Germany | diaserve Laboratories GmbH | -- | Iffeldorf | |
| Associate | Italy | Bio Group Medical System | -- | Talamello (RN) |