Appendix A: Alternate Type of Service Codes
You can create a library of Alternate Type of Service codes for each payer and attach the library to the payer at the payer level. The tables that follow outline certain payers and their Alternate Type of Service code values for paper claims. If you submit claims to these payers, you must create an Alternate Type of Service code library for those payers that use these values. Alternate Type of Service codes for electronic claims types are not explained here.