Legislation that makes major changes to the country's organ donor systems is set to return to Parliament this week.

MPs are scheduled to debate, and pass, on Wednesday, the second reading of National MP Chris Bishop's Bill.

It would see people who volunteer to donate an organ, receive 100 percent of their normal income for up to 12 weeks while they recover from their operation.

Responsibility for the payments is to rest with the Ministry of Health.

Chris Bishop said district health boards already have discretion to provide payments to organ donors, and for a variety of other operations.

"The Ministry's confident that the DHB and the Ministry itself will be able to gear up to deal with it. It's just about putting in the practical steps and the procedural stuff behind the scenes to make sure that they can pay out in a prompt way."

Mr Bishop is also expecting publicity around his Bill to have an impact.

"I think it will just make people more aware of the fact that we do have an organ shortage in New Zealand, and I think down the line once the bill comes into force I think it will basically remove one of those barriers for people that they have when they're thinking about donating."