A registered charity, RHAANZ is funded by member's fees and sponsorships.
However, that has proven inadequate, hence the approach to the Government.
There are only two other national rural health alliances in the world, and both received central funding, Dr London said.
Public reaction to RHAANZ's plight had been encouraging although no official response had yet been made, Dr London said.
That might be forthcoming on Thursday, when RHAANZ is scheduled to meet Rural Communities Minister Damien O'Connor to discuss funding.
The organisation had been due to meet the minister earlier this year to discuss funding but that was cancelled after Mr O'Connor's father died. The delay forced RHAANZ to take drastic action.
"From overseas, we know that without core funding it is very difficult for an organisation like this to continue beyond the establishment phase. We are not disclosing numbers at this stage...but it is a significant figure we couldn't raise from members or sponsorship.''
More than 600,000 people lived in rural New Zealand, equivalent to being the country's second largest city.