I will be taking CPC exam for the first time on Dec. 1st. If I was to have to repeat the test a 2nd time in early 2013, will the exam be drastically different enough that I would need to order CPC exam review book, new practice tests, as well as 2013 CCO Blitz, all for 2013 ? I have already ordered 2013 ICD 9, HCPCS, & CPT manuals for 2013. Thank you.