I let my EMT-P expire as I was not working at the time. Then 9/11 happened and I realized how much I missed it. I am now an EMT-I and I regret everyday letting my P go. Please don't do it. Find the time to maintain your certification. Here in Mass (one of the only states that does not accept the NREMT) If you are more than 1 year lapsed (I was) you need to retake the entire EMT-P course again. I do not have the time (12-18 months) or money (10-20 grand) or the energy to do it. On the plus side I joined the army reserves in April of this year. Shipped to boot on 4/17, graduated 6/29, went to Fort Sam to become a combat medic (68W) because I had my NREMT-I, I was able to cut the 6 weeks of NREMT-basic of my training. I graduated Fort Sam 9/14 instead of 10/24.