Important Information: If your National Provider Identifier (NPI) and Provider Transaction Access Number (PTAN) are not on the crosswalk, please visit the NPPES Web site at https://nppes.cms.hhs.gov/NPPES/Welcome.do to verify the supplier's information. The PTAN/NSC number must be indicated under Issuer as MEDICARE NSC. If you need assistance logging in to NPPES, please call 1-800-465-3203.

Note: PECOS can also affect your crosswalk. PECOS is the system used by the National Supplier Clearinghouse (NSC) for durable medical equipment (DME) suppliers to enroll in Medicare. Suppliers can log in to PECOS at https://pecos.cms.hhs.gov/pecos/login.do and verify that their NPI is listed correctly. For assistance with PECOS, call 866-484-8049 or contact the NSC at 866-238-9652. For more information, access the Frequently Asked Questions document on the CEDI Web site.