I've been lucky with the generosity of friends and strangers regarding the second one due a successful Go Fund Me, but I've also gotten walloped with some gnarly bills, most notably for Signatera blood tests for cancer particles and for genetic testing of the tumor itself. United Healthcare considers those experimental and thus uncovered. But the genetic testing of the tumor is essential because it might lead to targeted treatments.
Legislation has supposedly limited surprise out-of-network bills, but, even with insurance, costs can be very high, and those combined with not being able to work effectively leads to problems.