Written Correspondence
Suppliers may submit written inquiries to the DME MAC via mail, fax (615.782.4624), or email. When writing, please state your question or concern as clearly as possible including all pertinent information, i.e., NPI number, PTAN, and, if appropriate, the beneficiary's name, HICN, and date of service (note that email inquiries must not contain sensitive personal information). This 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.
Please use the following address for written correspondence inquiries:
CGS
PO Box 20010
Nashville, TN 37202
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.gov
website.

