One of western Sydney's busiest and most beleaguered hospitals will get a $576 million funding boost under a long-awaited upgrade announced by the Baird government.

Work on expanding Nepean Hospital’s emergency department will begin immediately, while an additional 200 beds, a dozen more operating theatres and a new neonatal intensive care unit will be built as part of the redevelopment. The state government has been under increasing pressure this year from doctors who have warned…