The benefits of collaborative purchasing are many, yet in the healthcare sector, in particular at hospitals, it is still uncommon. In this paper we identify major impediments for collaborative purchasing, resulting in a first component of our proposed collaborative e-purchasing model for hospitals; as a second component it contains a collaborative purchasing typology. After analysis of a first validation round with hospital purchasing professionals, the results show four applicable purchasing types and fourteen collaborative purchasing impediments that are perceived as important for hospitals. The model is further extended by possible IT solutions, identified by experts, addressing the specific fourteen impediments. We conclude that the collaborative e-purchasing model can be used by healthcare consortia, branche organizations, partnering healthcare institutes and multi-site healthcare institutes as a means to help identifying strategies to initiate, manage and evaluate collaborative purchasing practices.