Advanced practice nurses, registered nurses and medical practice assistants in new care models in Swiss primary care: a focused ethnography of their professional roles.

APNs and MPAs have a high potential to contribute to optimal care in new care models, which address needs of the elderly population. The experience from our sample may inform international health policymakers and practitioners about the tasks and responsibilities those health professionals can take over in PC when implementing new models of care. The practical experience with new models of care involving APNs and MPAs may also influence the future regulation with regard to the scope of practice of these health professionals in Switzerland.