A payment processor acting on behalf of a third party administrator to make payment on an adjudicated claim makes a straight through payment to an acquirer for a health care provider's merchant account. Via the authorization process, the payment processor generates an authorization code which is returned to the health care provider on its merchant statement for the payment. Concurrently, the remittance advice from the third party administrator is linked to the same authorization code as the payment by the payment processor which sends the advice in an 835-formatted transmission to the health care provider. Thus, the remittance advice may be linked (reconciled) with the payment on the merchant statement by the common authorization code.