COB Balancing Using the 5010 Format
The following calculations explain how COB is balanced using the 5010 format:
| Determined By | Calculation | 
|---|---|
| Payer | The Allowed Amount uses the prior payer's payment information coupled with adjustment information in the CAS segments in this loop.  The Allowed Amount = the prior payer payment + the sum total of all patient responsible adjustment amounts (in loop 2320) The patient responsible adjustments are identified by use of the Category Code PR in CAS01.  | 
| Provider | The Allowed Amount uses the prior payer's payment information coupled with the Remaining Patient Liability AMT segments.  The Allowed Amount = the prior payer payment + the Remaining Patient Liability AMT amount  |