Work will now start this month on major renovations to the ground and first floors of the hospital.
The aim of the project will be to improve patient care and the working environment for staff by creating a more modern and efficient healthcare setting.
Work will involve stripping the hospital back to its original steel frame to remove asbestos from the building and ensuring up-to-date fire prevention design
Interserve will complete the complex overhaul while the hospital remains operational in 2026.
As a result of the works operating theatres, critical care, radiology and outpatients’ services will all be upgraded.
Cardiff-based architect HLM designed the project with M&E consultant HLP and civil and structural engineer WSP.
Paul Gandy, Managing Director of UK Construction at Interserve, said: “Our excellent rack record in delivering projects similar in nature to this one, means we are now considered one of the country’s leading construction companies for healthcare projects and we look forward to starting work and creating a modern and efficient hospital for the people of Merthyr Tydfil and beyond.”