The Government has been forced to go back to the drawing board with the plans for the new Dunedin Hospital.

An independent review has found the project as currently planned is 'probably not achievable' within the budget of $1.88 billion.

Ministers Shane Reti and Chris Bishop have asked Health NZ for solutions and warned that upgrades to other hospitals are at risk if costs don't come down. 

Chris Bishop says there are two possible options to keep costs at the $1.88 billion cap.

"One is that we revise the current project within its existing structural envelope - that's on the new site - that could look at reducing the number of floors - or identifying some services that could be retained on the existing hospital site."

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