I think the OP probably sees an ED dietician and the dietician feels she needs a higher level of care for her ED (IOP)...is that right?

I've been in the position of my team suggesting a higher level of care and my not wanting to go. What I later learned is that they were usually right. I can understand that this is hard and definitely scary, but if your dietician and/or T could help you find an IOP program that your insurance would cover, would you be willing to think about it?

It doesn't sound like your dietician wants to abandon you-more likely, she can't ethically continue to treat you if you're in a bad state. She's probably hoping that your desire to keep your relationship with her might motivate you to choose treatment.

I've been in recovery for several years and I know how hard it is. Feel free to pm me anytime.