Reflective young man at one of our refuges

Northern Homeless Youth Dual Diagnosis Initiative (HYDDI) focuses on developing the knowledge and abilities of youth Specialist Homelessness Services workers in the north of Melbourne, including Hope Street workers, to identify and respond with early intervention to the complex needs of young people experiencing homelessness.

What does the program offer?

The initiative fosters ongoing partnerships between mental health, drug and alcohol and youth homelessness services and provides:

  • primary consultation offering a confidential specialist mental health and substance use assessment, with the case manager present to promote capacity building
  • secondary consultation advising case managers on brief interventions and strategies, information on referral for specialist treatment, services coordination and clinical problem solving
  • individual and group support for case managers on working with clients with a dual diagnosis
  • short term co-case management of clients with an emerging or current complex needs or dual diagnosis
  • training and development

HYDDI is funded by the Victorian Government and Commonwealth Government.  Northern HYDDI is implemented through a partnership between Hope Street and the NorthWestern Mental Health (NWMH), the mental health arm of Melbourne Health. A HYDDI Practitioner is employed by NWMH's Substance Use and Mental Illness Treatment Team (SUMITT) and is co-located at Hope Street.

How can young people enter this program?

Young people must be:

  • 16 - 25 years of age and have an emerging and/or impacting mental health and substance use issue (no formal diagnosis required)
  • linked via connections/supports (family, friends, school, training, employment, medical, etc) to the North and North-West Metropolitan region of Melbourne
  • assigned to a primary youth housing case manager
  • not already linked into a government mental health service

Please contact your nearest access point(s) listed on this page to find out more about entering this program.


During this period, the Northern HYDDI specialist practitioner:

  • saw 78 young people for dual diagnosis related issues, of these:
    • five were seen for long-term therapeutic work (ie greater than 12 months) to address particularly complex needs;
    • 12 were seen for co-case management alongside specialist youth homelessness practitioners; and
    • 61 young people were seen once for single session work.
  • conducted 417 sessions of direct clinical work with these 78 young people;
  • provided 109 secondary consultations to workers within the sector; and
  • conducted 159 capacity building and educational sessions in the form of structured sessions for teams or programs around an identified topic related to dual diagnosis, or informal educational sessions around a clinical related question.

Learn more about the impact of this program from the report below.


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