This is an American list; who would you suggest if attempting to do a comparable UK TV character list? See http://www.squidoo.com/TV-disability.
There are alternative lists out there:
the WheresLulu site had a useful (US again) list in 2011;
InTheseTimes.org brings this up to date with a critical look from late 2013 at what examples are out there and what is upcoming (the Michael J Fox character with Parkinson's is highlighted);
WhatCulture Top10 Film Characters.