Hello, I took and passed the Clinician/Practitioner HIT Pro exam last March. According to HIT Pro™ statistics, this exam is the hardest out of the 6 roles so I'm definitely happy I passed it. This website helped me. HIT Pro exam It provides you with a sample exam akin to what you will take on the actual test. Also go to this website: http://onc-ntdc.info/ Register and download the component pdfs related to this specific role. And obviously study the handouts provided to you during the course. Best of luck.