How can I avoid unnecessary development requests and increased processing times?

A NSC enrollment analyst reviews all documents submitted by a DMEPOS supplier to check for accuracy and completion. Suppliers will receive written notification either by fax or mail detailing the information that is missing and instructing them on the next steps to submit the proper information for processing. All information must be received within a 30 day time frame or the document will be closed resulting in deactivated Medicare billing privileges where applicable. In addition, suppliers must submit a valid surety bond and have accreditation where required to avoid application rejection.

When initially enrolling or submitting an application for an additional location, suppliers are required to complete and submit the Authorization Agreement for Electronic Funds Transfer (CMS 588). Suppliers should submit a separate form for each Medicare contractor where it submits claims and include with each form a voided check, preprinted deposit slip or confirmation of account information on bank letterhead for verification of the account number. The NSC will send the agreements to the appropriate DME MAC for processing.

Suppliers should only submit the CMS 588 to the NSC when initially enrolling or when enrolling an additional location. The NSC does not process or enroll suppliers into the EFT program. Any changes to EFT information should be submitted following existing procedures as dictated by the DME MAC billing jurisdictions.

Any other questions related to the enrollment process, should be directed to the NSC Customer Service Line at 866-238-9652.

Contact NSC

Email National Supplier Clearinghouse

Contact a specific NSC department

Telephone: 866-238-9652

IVR: 866-238-9652


National Supplier Clearinghouse

Palmetto GBA, AG-495

P.O. Box 100142

Columbia, SC 29202-3142

Other Palmetto GBA Sites

Palmetto GBA Home

DMEPOS Competitive Bidding Program

Jurisdiction J Part A MAC

Jurisdiction J Part B MAC

Jurisdiction M Part A MAC

Jurisdiction M Part B MAC

Jurisdiction M Home Health and Hospice MAC


National Supplier Clearinghouse MAC


RRB Specialty MAC Providers

RRB Specialty MAC Beneficiaries