The answer to the question implicates the doctrine of necessities, sometimes also called the doctrine of necessaries. It is a common law concept that has in some states been made statutory, and in other states has been abrogated by statute.
We don't have it here in Florida, but what we do have are health care providers that are usually very keen to corner spouses into signing *something*, *anything* to make them liable for the other spouse's medical bills.
So you're going to need to flyspeck everything you signed at every provider's business desk to ascertain whether or not you signed your life away.
I cannot speak specifically to Florida, but typically, one spouse is responsible for the necessary medical bills of the other.
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