Construction of the new St Helens District Hospital is expected to be completed by November 30.
The Department of Health said the new facility would retain existing services such as acute beds, emergency response capacity, and consulting rooms.
Roofing is on the building, windows have been installed, and floor and wall linings are complete in some areas.
Construction on the new facility began in November last year.
The new facility is at 10 Annie Street, St Helens.