Hi,
Usually the billing service's name and/or address are not on the CMS forms, unless payment for the provider goes to the billing service. If you are submitting claims thru a clearinghouse then they usually request certain information from you on both your service and the providers you bill for. As far as insurance companies, it is not required that you are 'listed' with them, unless you are submitting claims electronically. Some insurance carriers will require paperwork from you in that case.
Michele