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CGS Administrators, LLC

Serving the states of MN, WI, IL, IN, OH, KY and MI

Contact Information

IVR: 877.299.7900
Customer Service: 866.590.6727
Hearing Impaired: 888.897.7534

In addition to telephone services, suppliers may also send written inquiries to the DME MAC Written Correspondence team. Suppliers may submit written inquiries to the DME MAC via mail, fax (615.782.4509), or email. When writing, please state your question or concern as clearly as possible including all pertinent information, i.e., NPI, PTAN, the last 5-digits of your TIN, and, if appropriate, the beneficiary's name, Medicare Beneficiary Identifier (MBI), and date of service (note that email inquiries must not contain sensitive personal information). Please send letters and faxes on official letterhead, and attach your official letterhead to email inquiries. The letterhead should contain all practice location addresses (if you have multiple practice locations) and at least one of the addresses should match the practice location address on file. Including this information will allow us to respond more specifically to the inquiry. You must also include your name and phone number. After the correspondence is received by the DME MAC, a Written Correspondent will respond to the inquiry within 45 business days.

Written Correspondence may be sent to:

PO Box 20007
Nashville, TN 37202

When calling Customer Service, you will initially speak to a Tier 1 CSR. Tier 1 CSRs are capable of handling most supplier inquiries. In some cases, Tier 1 CSRs may need to transfer the call to a Tier 2 CSR (also known as the Help Desk). If a callback is required, a Tier 2 CSR will return your call within 10 business days.

If you have a complex inquiry that goes above and beyond the normal scope of a Tier 1 or Tier 2 CSR, the inquiry will be forwarded to the third level of Customer Service, the Provider Relations Research Specialist (PRRS) team. The PRRS will research the inquiry and respond either by phone or by mail within 45 business days.

Medicare beneficiaries and their representatives should contact 1.800.MEDICARE (1.800.633.4227) for all of their questions about Medicare. 1.800.MEDICARE is available to assist beneficiaries 24 hours a day, 7 days a week. For questions specific to DME MAC, beneficiaries should ask for "Medical Supplies" or visit the Medicare.govExternal Website website.

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