Yes, first your mother can try to get the decision changed by following the CCAC's complaints process. Every CCAC is required by law to have one. Start by asking the case manager for a written explanation of their decision and a copy of the complaints process.
If following the complaints process doesn't work, your mother can appeal to the Health Services Appeals and Review Board (HSARB). This Board has the power to change the CCAC's decision. Contact the HSARB to find out how to start the appeal, and to get a copy of the Rules that apply to the appeal process. Your mother does not need a lawyer for this process but it is a good idea to have one if possible.
This answer is taken from CLEO's October 2012 edition of On the Radar.