E.I.N.

The E.I.N. is the provider’s Federal employer tax identification number. Every business in the United States, including doctor’s offices and practices, is required to have a Federal employer tax identification number. It is used for reporting business income to the Internal Revenue Service. If the practice does NOT have an E.I.N., contact the Internal Revenue Service to obtain one. The option of printing either the SSN or the EIN in box 25 of the CMS-1500 is selected in the Insurance catalog.