Indications are that the hui, at Hoani Waititi, will involve providers from Ngapuhi, Tainui, Ngati Porou, Te Whanau a Apanui and Ngati Kahungunu, which represent a a large percentage of the Maori population.
Mr Tamihere said irritation at conditions had been building, and the court case had sparked the call for action.
He said a pattern of yearly contracts and terms which meant staff such as nurses received salaries 20 per cent lower than their public counterparts contributed to the anger felt by providers.
"It's a known and overt second class treatment. It's got nothing to do with Family Start now the issue is equality of funding with other providers, that's what it's starting to boil down to."
He said the Crown had a Treaty obligation to treat Maori providers preferentially.