The high-profile role comes as part of a deal which has seen Scotland's answer to CABE, Architecture and Design Scotland (A+DS), agree a three-year framework deal with NHS Scotland.
The agreement will also see an increase in enabling on the healthcare schemes and the development of a design assessment programme for new hospitals.
The Scottish Executive's Health Department is publicly keen to show its commitment to improvements in hospital design and is about to produce a 'Policy on Design Quality'.
Hoskins' new position will see him take over the strategic leadership of the design champions network in NHS Scotland.
This appointment re-affirms Hoskins' position as possibly the most influential young architect currently working in Scotland.
This morning's announcement is also another example of the Scottish Executive's determination to place design and architecture in a pivotal public relations position in its programme.
'A+DS congratulates the health department for forming a policy on design quality and is delighted to support them in delivering better healthcare environments,' A+DS chair Raymond Young said this morning.
'The agreement is fundamental to our work in this core area. It will allow us to work collaboratively with health boards and their project teams in raising awareness and ambition,' he added.