"The challenge for us is finding enough funding," Dr Chamberlain said.
Te Tai Tokerau PHO chief executive Rose Lightfoot said the organisation funded three youth health clinics, which had been well utilised and very effective.
Manaia Health PHO Chris Farrelly agreed there was a high need for young adults to have access to healthcare, particularly in regard to mental health.
While the Northland DHB will underwrite the scheme, its contribution came from previous savings from its strategic investment fund. The PHO's contribution came from previous government funding allocated to services to improve access to healthcare.
It is hoped the free GP visits for all under 13s will mean fewer hospital admissions from children due to largely avoidable conditions such as rheumatic fever, bronchitis and respiratory infections.
There was a high need for access to adequate healthcare when it came to Northland children, Dr Chamberlain said.
"We know that our children aren't as healthy as the rest of New Zealand," he said. "This is largely due to the low socioeconomic population, often in rural locations."
While the announcement was a step in the right direction, it was just the start of the journey, Mr Farrelly said.