In-N-Out Burger In-N-Out Burger Can't Seem to Pay My Bill on TIME!!!! Irvine California

Apparently not only did In-N-Out Burger expose me to Isocyanates  (I was a painter for them) but they cant seem to pay their bills either! They sent me to a doctor on May 3, 2013 and STILL havent paid it!!! My attorney has called, and sent a copy with a letter, but still In-N-N-Out Burger cant seem to scrap up $115.00! 
I mean really! They ordered the test. They are required to pay for it. So can someone please tell tell me why this BILLION dollar company has not paid a tiny bill of $115.00? Its almost been 6 months!! Is this an example of how they pay all their bills? I want this bill paid!!!! they are threating to send it to collections! 
PAY YOUR BILL IN-N-OUT BURGER!!