Client and Assessor Login Are you an existing HDAA client or assessor? Log in to your secure profile area in the relevant system below. Assessment Gateways Log Into the Client Gateway Log Into the Assessor Gateway onTrack Systems onTrack For Diagnostic Imaging onTrack For Dental How Can HDAA Help You Today? National Disability Insurance Scheme (NDIS) Assessments HDAA is your experienced NDIS assessment partner that can provide both verification and certification asssessments NSQHSS Dental Services The ACSQHC has granted approval to HDAA to assess health service organisations using the NSQHSS for Dental Practices. Diagnostic Imaging (DIAS) Accreditation HDAA has been an approved accreditor for DIAS since its implementation in 2008. View All HDAA Programs HDAA provides assessment and certification services for numerous Australian standards. View our range of services from the HDAA home page.