Can CEU’s Be Used Before Certification?

CEU credits can’t be applied until after you have become certified.

As per AAPC: https://www.aapc.com/medical-coding-education/faq.aspx

May I use education completed prior to obtaining my certification?
Credit will not be awarded for educational activities completed prior to certification.

If you have a current CCO Club subscription you can re-take any CEU quiz to earn the CEU after you have become certified.