In south Florida, facility billing is comprised of reports and payer breakdowns. Now, more and more facilities are requesting an EIV form. I have sent out many of these forms but i never understood how they were calculated. I know from experience the facility usually gives it expected percentage of return... Is that the formula that is used on the EIV or is there a different formula to ensure the correct pay out expectation...like is it based on payers, fee schedules etc...or what the billing company and facility agreed upon in the contract. Please help... I'm currently located in south Florida.