You have done all of the work and have received your Health Claims Specialist Certificate. Now it is time to take the CBCS certification exam through the NHA. STI is an approved testing site. A copy of your high school diploma or GED is required to take the exam. The maximum time allowed to complete the exam is 2hrs. There are 120 total questions. It is a paper/pencil exam. Please make sure to have a #2 pencil with you.