I called the billing department to get that "settlement offer" of 10%.
"The what?" the customer service representative asked.
"The settlement offer that I was told about."
"We don't have such a thing."
I explained what I was told before, the last time I called, and was put on hold for a full ten minutes.
When the representative returned, she said, "Because the previous person you talked to promised you a settlement offer, we must uphold this agreement, but we do not have such an offer in place."
I agreed to pay the bill in full, minus ten percent, which came to over $1100 and thanked the representative.
Needless to say, we will not need this offer ever again, because we do not intend to go to the medical group ever again.