Internet-Based PECOS User Tools

The Centers for Medicare & Medicaid Services (CMS) has established an External User Services (EUS) Help Desk to assist you if you encounter an application navigation or access problem with Internet-based PECOS. A navigation problem occurs when you are unable to determine how to use Internet-based PECOS. An access problem occurs when Internet-based PECOS is not operating properly (i.e., system is not operational, operating slowly or a system-generated error message prevents data entry). A system-generated error message does not include messages or warnings that are created when you enter data incorrectly or ignore system prompts.

To report an application navigation or access problem with Internet-based PECOS, contact the EUS Help Desk at 866-484-8049 or send an email to

Additional tools are available for users including fact sheets (PDF, 2.49 MB) and Internet-based PECOS webinars on the CMS website.

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