The highly critical report stemmed from a six-month inquiry into the patient's care, ordered by the Ministry of Health's director of Mental Health and Addiction Services, Dr John Crawshaw.
It was known about by high-ranking officials including former Minister of Health Dr Jonathan Coleman. The current Health Minister, Dr David Clark, has been advised.
The report made more than 100 findings expected to shape mental health services across the country, but at least some of the desperately-needed changes have yet to be implemented.
"There was no long-term care or responsibility taken by any of the specialist child and adolescent psychiatrists, clinical teams or caregivers, beyond their specific facilities," the report said.
Though some specialists and institutions were praised for their efforts, none treated the patient properly for what was thought to be the root cause of the problems, which cannot be identified for legal reasons.
The inquiry found "serious shortcomings" in the services provided to the patient and made findings relating to continuity and consistency of care; clinical decision-making; clinical assessment, diagnosis and formulation; discharge and transfer planning; care and relapse prevention; communication between clinical teams; and Child, Youth and Family (now Oranga Tamariki) placement decisions.
In a letter attached to the report released more than a year ago, Crawshaw expressed his concern over the patient's treatment, which was brought to his attention by district inspectors of mental health - lawyers who advocate for the rights of patients.
"After careful consideration I have formally accepted the inquiry's findings and recommendations, some of which have significant implications for mental health services nationally," he wrote.
Earlier this month Crawshaw said agencies had responded well to the report and were working toward implementing the recommendations.
"I am satisfied with the progress in implementing recommendations and confident agencies are treating them with the seriousness they deserve.
"I correspond regularly with agencies on their progress implementing the recommendations."
It's understood the report has been released to the district health boards involved in the case.
When asked whether the report would be shared with the national mental health inquiry panel, Crawshaw only said the Ministry would comply with its obligations under the Inquiries Act.
The mental health and addiction inquiry panel chairman, Professor Ron Paterson, confirmed the panel had now asked for the report and would consider it as part of its inquiry.
"Yes we are aware of that inquiry and that, because it relates to one current patient, it's excluded from our terms of reference," Paterson said.
"But we have asked the ministry for information about the key findings and recommendations and that information has been shared with us."
Lawyer Moira MacNab, who works for mental health patients and their families, criticised the Ministry of Health for trying to keep the report secret.
"Fundamentally saying nothing hasn't improved mental health services and we've come to a point where there's been years and years of failings. My view is it's only when the community starts responding and asking questions, and more importantly when the media gets involved, that any change occurs," she said.
"I support openness and full and frank discussion because we've got a major issue where most families have somebody in the family or know friends with mental health issues. We've got a problem and we need to sort it."
The purpose of the national mental health inquiry is to hear from people with "lived experience" of poor mental health and addictions, those affected by suicide, and workers in the sector on New Zealand's approach to the issues, and what needs to change.
Submissions can be made online or people can attend public meetings across the country.
The panel will make recommendations for changes to improve services with a particular focus on equity of access, community confidence and better outcomes, particularly for Māori and other groups with disproportionately poorer outcomes.
WHERE TO GET HELP:
If you are worried about your or someone else's mental health, the best place to get help is your local GP or local mental health provider. However, if you or someone else is in danger or endangering others, call police immediately on 111.
OR IF YOU NEED TO TALK TO SOMEONE ELSE:
• LIFELINE: 0800 543 354 or 09 5222 999 within Auckland (available 24/7) • SUICIDE CRISIS HELPLINE: 0508 828 865 (0508 TAUTOKO) (available 24/7) • YOUTHLINE: 0800 376 633 ,free text 234 or email talk@youthline.co.nz or online chat. • NEED TO TALK? Free call or text 1737 (available 24/7) • KIDSLINE: 0800 543 754 (available 24/7) • WHATSUP: 0800 942 8787 (1pm to 11pm) • DEPRESSION HELPLINE: 0800 111 757 • SAMARITANS – 0800 726 666.