The firm has also won the separate £18m FM deal to provide ongoing hard facilities maintenance and lifecycle management over the 25 year concession period.
Morrison Construction will build a 160,000 sq ft specialist mental health facility on the west edge of the existing campus in Morningside.
The deal for NHS Lothian has come through the Hub South East Scotland and is one of the biggest jobs under a Hub agreement so far.
When operational the facility will provide services for the adult acute mental health inpatient service, intensive psychiatric care, national brain injury unit, mental health rehabilitation and older people’s mental health assessment and treatment services.