If you have a dependant with a disability your insurer may increase the price of your health insurance.
For the purposes of Private Health Insurance, the Australian government defines a dependant with a disability as a person aged 18 or over who is a participant in the National Disability Insurance Scheme (NDIS). However insurers have the discretion to cover people with a disability who are not participating in the NDIS.
Check with your health insurer whether it charges an extra fee to cover dependants with a disability.