CPC certification now or later

I have been working as a medical coder for a little over a year now. I want to get my CPC certification but with ICD 10 coming out in a couple weeks should I just wait and take the exam after the first of the year. I would only have to pay for one test that way (I wouldn't have to take the ICD 10 Proficiency test) but I feel like I know a lot of ICD 9 codes without looking them up. My job does not require certification and they are not pushing me but I would get a raise.....:confused:
Please... Any Advice would be much appreciated!!

CPC certification now or later