"Are you good?"
adverb you say?
... in the sentence "He swam well," "well" is an adverb that describes how he swam. But when you say, “I am well,” you're using "well" as a predicate adjective. That's fine, but most sources say "well" is reserved to mean “healthy” when it's used in this way. (1, 3, 4) So if you are recovering from a long illness and someone is inquiring about your health, it's appropriate to say, “I am well,” but if you're just describing yourself on a generally good day and nobody's asking specifically about your health, a more appropriate response is, “I am good.”