She was approached by the organisation late last year "which was very much an honour", Ms McKay said this week.
"I think very highly of what they do and the way they operate."
As the honorary role of patron was new for her and the organisation, details of what it would involve were still being discussed. However, she believed she would be a spokeswoman and facilitator.
"Working in partnership with them to help with their publicity and move forwards with projects."
Regional funding manager Lyle Palmer hoped the appointment of a patron would help the organisation raise its profile in the community.
Mrs McKay would become the "face of the organisation" and someone the public could connect with, he said.
She was an "ideal candidate" because of her highly developed skills and respect within the disabled community.
Because of severe rheumatoid arthritis she had been in a wheelchair since the age of 10 and has had a long association with CCS as a client, agency, advocate and colleague.
The organisation was "moving on so many fronts" and was taking an active approach to issues such as education, transport and services for disabled people, which was how change was made, she said.