Health Minister David Clark has approved Counties Manukau DHB's self-funded $14.6 million dialysis and cardiac laboratory expansion at Middlemore Hospital.
The new facilities at the hospital would make a real difference to the lives of more than 100 seriously unwell people each week, he said.
"The DHB has high health needs, particularly amongst Māori and Pacific communities, and we know this investment will make a big difference to both patients and staff," he said.
The almost $15m would be spent on a high dependency dialysis unit and cardiac catheter laboratory services expansion.
Coronary heart disease is the leading cause of death in the Northern region and over 1500 patients were treated in the DHB's cath lab in the past year.
Having a second procedure room, according to Clark, will enable the DHB to carry out more lifesaving procedures more swiftly, also reducing the need for further care in the future.