Note: When entering alternate type of service codes for paper or electronic claim types, you must fill in both of these fields. For example, if a payer requires an alternate type of service code for paper claims, but they want the standard type of service code for electronic claims, then you must enter the alternate code in the ALT Paper field and the standard code in the ALT Electronic field. This same logic applies if the payer requires an alternate code for electronic claims, but they require the standard code for paper claims. If either one of these fields is left blank, then the corresponding type of service code field on the claim form will also be blank.