A Canterbury DHB board member fears clinicians will become more like civil servants under the new health care system.
All District Health Boards will be replaced by one national health organisation, Health New Zealand.
A new Maori Health Authority will have the power to commission health services, monitor the state of Maori health and develop policy.
A new Public Health Agency will be created.
Health Minister Andrew Little says the reforms mean for the first time, we'll have a truly national health system.
He says the kind of treatment people will get, will no longer be determined by where they live.
However, CDHB's Jo Kane told Heather du Plessis-Allan she's wary of the overhaul.
"I'm just feeling a bit suspicious. The Code of Conduct gags people from talking about it, so become a political servant in a way, not able to speak out, and I think Boards of Directors have a duty and a directive to speak out."