At what point do they put you IP for an eating disorder?

I'm scared my therapist is going to ask me to do PHP tomorrow, and I'm scared I'm going to say yes because I might feel desperate at the time even though I really don't want to do it, and I'm scared they're going to say I'm "too sick" (because I have heard of this happening) for PHP even though a lot of my problems are caused by lack of sleep and Hep C, and I don't think not eating/purging is really causing a significant amount of harm in comparison.

What are the criteria? Is there a certain weight/BMI or lab results or anything?

I do not know. Here is some reading for you:

Question I recently saw in my office a patient whom I had initially diagnosed with anorexia nervosa 6 months earlier and she was continuing to lose weight. Her physical examination findings in the office revealed a blood pressure of 85/55 mm Hg and a heart rate of 55 beats/min at rest. Should patients such as this one be sent to the hospital for inpatient monitoring and treatment?

Answer There is a lack of clear evidence-based guidelines for hospital admission of adolescents with anorexia nervosa, resulting in a high degree of variation in practices among physicians. Clinical judgment based on expert opinion seems to be the main driver of the decision to admit for inpatient care. Acceptable indications for a patient’s admission include the following: weight is less than 75% of ideal body weight, temperature is lower than 35.5°C (95.9°F), heart rate is less than 45 beats/min, systolic blood pressure level is lower than 80 mm Hg, orthostatic change in pulse is higher than 20 beats/min, or orthostatic change in blood pressure is greater than 10 mm Hg. Consultation with an adolescent medicine specialist is highly recommended for adolescents with these vital signs.

Anorexia nervosa requiring admission in adolescents - PMC

You are an adult but still worth reading.

Involuntary Treatment of Patients With Life-Threatening Anorexia Nervosa | Journal of the American Academy of Psychiatry and the Law

Perspectives on Involuntary Treatment of Anorexia Nervosa - PMC

Thanks Tart Cherry Jam. Feels better that it seems like they're more likely to continue pushing PHP.

I almost got sent IP for an ED in 2020 and I'm not underweight and the only reason she didnt admit me was because I was drinking water. And I was still eating too just restricting and eating safe foods which they thought was enough to send me for an assement. They were just being jerks. I got sent to IOP instead.

The dumb thing is my surgeon was really happy with my weight loss and said we could hold off on a surgery until I lost more.