The NDIS guideline has provided a method to determine your service category by using the Modified Monash Model.
Step1: Use the following link to search for your MMM level:
http://www.doctorconnect.gov.au/internet/otd/publishing.nsf/Content/MMM_locator

Step 2: Once you have found your MMM level, compare to the following table to work out whether you live at a remote/very remote area.
