Minimum BMI for surgery?

[Sarah250]

After 10 years of suffering with pelvic pain, small patches of endo, cysts and horrendously heavy periods I’m finally allowed (after a lot of fighting) a hysterectomy to hopefully solve all these issues. My question is that I’m currently very underweight (due to currently suffering with anorexia) with a BMI of 15.7 and wondering what would be the minimum BMI needed to get the operation ?

I know they won’t touch me at the moment as I wouldn’t heal but I need a goal to reach for motivation !!

TIA ! X