insurance question dr.Frantzides

just need to know if anybody else has had any problem getting your insurance company to reimburse you for the money paid upfront to Dr. Frantzides? I have bc/bs and they only paid $1100.00 and his total bill is $12635.00 and I paid $6500.00 up front I'm trying to fight them but would like some input on what past patients have had to deal with thanks Todd p.s. only 4 pounds to go till 100 -- Todd Henry