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Waikato DHB - Intellectual Disability/Mental Health Dual Diagnosis Service

Mental Health & Addictions Service



Intellectual Disability/Mental Health Dual Diagnosis Service

Programme Areas

Mental health

Programme Type

Disability support



Age Groups

Adult / pakeke, Older adult / kaumātua

Referral Types

GP, DHB clinical services

Referral Process

As we are a specialist service, individuals must be referred by their GP. It is essential that all referrals are in writing. We expect the GP to remain involved as the primary physician and provide investigations and management of the physical care of the patient as appropriate.

Referrals need to be addressed via the Waikato DHB - Triage Service. If the triage team feel the referral team is appropriate it will be passed to the IDDD team, who will then either accept the referral or decline the referral with advice regarding appropriate alternatives.


The Intellectual Disability Mental health dual diagnosis service is a community based specialist psychiatry outpatient service for those with co existing intellectual disability and serious mental illness aged over the age of 18.

Acceptance into the service is based on the premise that the IDDD service aims to facilitate the optimal care of people with intellectual disability and serious mental illness-/suspected psychiatric disorder who have associated level of complexity requiring input from specialist mental health service.

The needs of dual diagnosis clients may fall into either IDDD service or adult mental health services depending on the complexity of their presentation. The most appropriate service to meet these needs is determined clinically.

Geographically, the IDDD service accepts referrals for people living in Hamilton. Although some referrals may be accepted in surrounding towns, this may require a 'shared care' arrangement with the expectation the person travels to Hamilton for medical appointments.

The following are not provided:

  • Eligibility IQ testing
  • Counselling services
  • Needs assessments for funding of services
  • Behaviour management
  • Accommodation provision or other support services


The IDDD service is a small team consisting of a part time Consultant Psychiatrist and two full time Community Nurses. The team is also supported by a team co-ordinator and administrator. All our clinicians are appropriately trained.

The service does not currently include psychology, social work, or occupational therapy services. Once accepted a patient will be allocated a key worker who will offer case management in the community.


No fees apply


Mon – Fri8:30 AM – 5:00 PM

The team does not offer a specific out of hour service and does not provide crisis cover/interventions.

For after hours or mental health emergencies, phone 0800 50 50 50

Public Holidays: Closed Auckland Anniversary (31 Jan), Waitangi Day (Observed 7/2/22) (7 Feb), Good Friday (15 Apr), Easter Sunday (17 Apr), Easter Monday (18 Apr), ANZAC Day (25 Apr), Queen's Birthday (6 Jun), Labour Day (24 Oct).
Christmas: Open 20 Dec — 24 Dec. Closed 25 Dec — 26 Dec. Open 27 Dec — 31 Dec. Closed 1 Jan — 2 Jan. Open 3 Jan — 7 Jan.

Contact Details

Waikato Hospital
Pembroke Street
Hamilton 3204

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Street Address

Waikato Hospital
Pembroke Street
Hamilton 3204

Postal Address

Pembroke Street
Private Bag 3200
Hamilton 3240

This page was last updated at 8:12AM on April 22, 2020. This information is reviewed and edited by Waikato DHB - Intellectual Disability/Mental Health Dual Diagnosis Service.