yes start early on all your stuff. I am scrambling lol and no insurance covered my titers with no problems. I had quite a few bumps my cpr for being a cna at a hospital wasnt good enough it got denied. I just learned I need to have my tb done twice in two steps so placed then read and then placed and then read again...... I also had to go somewhere else for Dtap because my doctor didnt offer it. so give yourself time for it to get denied and be able to correct it.