Co-tenancy laboratory: It’s a simple phrase that represents a remarkable cost reduction concept. Yet the value of laboratory co-ownership has remained illusive to healthcare executives and financial officers. It’s possible that the initial reluctance to embrace laboratory co-tenancy exists because this model brings together competitors to operate as co-owners. In order to receive reference laboratory testing at reduced cost (the fundamental purpose of co-tenancy), a shift in thinking must occur, acknowledging that the benefits derived are not diminished because a competitor enjoys them too. It’s analogous to two organizations that purchase their electricity from the same utility company. There’s no inherent disadvantage to either because both rely upon the same source to fulfill their energy needs.