For example, this surgery clinic will treat your appendicitis for less than the average patient's deductible + coinsurance. I'm including the flight + hotel stay in that estimate.
https://surgerycenterok.com/pricing/appendectomy-laparoscopi...
The problem is how you go about finding this information. Most ASC's and even independent doctors are extremely obtuse precisely to hide this huge liability from you. Hospitals will treat you like you are joking. Most hospital billing staff will prefer to do a cartwheel for you, instead of quoting you a price (insured or not). Or they will give you the super helpful range of 1,000 to...100k. Yes,I'm exaggerating to make the point. Heck, even if 1 out of 3 facilities do give you the estimate you seek, that's still 1 hour of time wasted for every 3 calls (avg call hold+time = 30mins) made.
For this reason, I recommend you go with a facility that is part of https://fmma.org/
Disclaimer: I don't have any relationship with OK Surgery or FMMA. Only a big fan, and also working with my startup to take out insurance out of regular healthcare choices.