Not sure. Most likely some sort of credit card thing would be used and right off the admitting nurse or office staff would know it’s that ObamaCare stuff and refuse it. It’s dealing with the paperwork then arguing the fee and having it turned down where the provider has to resubmit over and over to get reimbursed. The government will set the fee schedule; then too, how long to get reimbursed.
Doctors will simply go cash only. You pay them, they give you a copy of what is done and you submit it to your insurance company for reimbursement.
Then, you will learn what they use to go through to get paid.