Mel,
So here is a thought. Take one of your checks, cut a hole where you write the amount and cut a hole where your signature would be. Give them that check and tell them you think that you are even!
If they push back, let them know you would have understood a minor surgical mistake but it became major because of her refusal to see you to determine what was the matter when you had serious issues post surgery.
That's my opinion. I've never done anything like that, but then again I've never had any doctor do what you described yours did.
Seems like a hole in the check making it no good is fair for a hole in the bladder. It won't even be a risk to her life (not getting paid) the way it was to you when she refused to see you for follow up.
Mike
Age 54
10/31/06 dx CIS (TisG3) non-invasive (at 47)
9/19/08 TURB/TUIP dx Invasive T2G3
10/8/08 RC neobladder(at 49)
2/15/13 T4G3N3M1 distant metastases(at 53)
9/2013 finished chemo -cancer free again
1/2014 ct scan results....distant mets
2/2014 ct result...spread to liver, kidneys, and lymph...