Nationally, the number of people admitted to mental health inpatient units, presenting at emergency departments and calling adult mental health services increased over the five years. Meanwhile, the number of dedicated community beds dropped.
Labour's associate health spokesman David Clark believes the data shows funding for mental health services is drying up across the country.
But Health Minister Jonathan Coleman says the claims are wrong and funding is increasing annually.
"The trends are worrying," Dr Clark said. "Figures obtained by Labour show the number of people presenting to emergency departments as a result of mental health issues have more than tripled in the last four years.
"Alongside that callouts for adult mental health services have risen significantly and the number of mental health clients admitted to DHB mental health inpatient units is also increasing. At the same time there are fewer dedicated beds available for patients. Too often care is being devolved to the community without support and funding following."
Dr Coleman has said claims about funding drying up for mental health services were wrong.
"Funding for mental health and addiction services has steadily increased every year under this Government, increasing from $1.1 billion in 2008/09 to over $1.4 billion in 2014/15."
Dr Coleman said the Government had several mental health initiatives under way, including a recent $500,000 funding boost for initiatives targeted at rural communities.