I have to ask because I am mad! I work for a F/T EMS service and I am a retired FF/Medic who has a question. How many Fire/EMS services still use 10 codes. I hate hearing 10-5 when you clear at a call. I think and thought that things were suppose to change follwing 9/11. Am I wrong? I guess what concerns me the most is that I was a carear FF/Medic in S.C and then moved back up north and started to run F/T EMS and the codes are diffrent. Is anyone also running into this problem?