Medical Informatics brings methods and solutions that could support reducing healthcare's ecological footprint. Initial frameworks for Green Medical Informatics solutions are available, however these do not address organizational and human factors. Including these factors in evaluation or analysis of (technical) interventions aimed at making healthcare more sustainable, is essential for improving usability as well as effectiveness of these interventions. Interviews with healthcare professionals from Dutch hospitals led to preliminary insights into which organizational and human factors impact the implementation and adoption of sustainable solutions. Results indicate that forming multidisciplinary teams is considered an important factor for realizing intended outcomes in terms of reducing carbon emissions and waste. Some other key factors mentioned are formalizing tasks, allocating budget and time, creating awareness and changing protocols to promote sustainable diagnosis and treatment procedures.