All mental health-related calls to 111 and other lines will be triaged through a single system from early next year.
The new system will deal with about 45,000 Kiwis a year, the Government expects.
Health Minister Dr Jonathan Coleman said the expectation was for all District Health Boards to be covered by the end of 2017.
The new mental health triage system would be established within the existing national telehealth service.
Launched last year, the service brings together Ministry-funded health advice lines. Nurses use a clinical decision tool to direct cases to different services.