Integrated care has been recognized as a global movement in transforming care systems to promote person centred care, and to accommodate the growing care demand amidst the rapidly changing and ageing global population. The scope of its practical implementation and the intended impact of integrated care can be wide and diverse. For example, integrated care can be seen to improve the coordination of care or ensure streamlined care pathways; to reduce unnecessary use of institutional care; to reduce costs; to improve people’s care experiences and outcomes; to support workforce developments; to improve public health and even to address inequalities in care. This wide range of objectives brings along numerous complexities to be able to assess the impact of integrated care. It requires a multifaceted, methodologically robust approach that considers the whole spectrum of operationalised integrated care and balancing impact across various aspects and stakeholders.