IBCCES card

Does anyone else have an ibcces card? I have medical issues that make it hard for me to stand in line long periods of time without having to leave to use the bathroom or sit down. My son is 14 and required to have a guardian with him so when this happens, it ruins his time too as he has to leave the line with me. I’m going to my doctor today but unsure of what I need from her as there’s no form to fill out. Any advice would be helpful. Thanks.