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CGS Administrators, LLC

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

Information You Need When Calling Customer Service

When calling customer service, please be prepared to provide all pertinent information related to your inquiry at the beginning of the call, i.e. NPI, PTAN, last 5 digits of your Tax ID, the beneficiary's Medicare Beneficiary Identifier (MBI), DOB, and DOS. Please use the MBI Converter Tool to assist with entering your MBI on the keypad.

All required information can be found on your remittance advice. Customer Service representatives may not be able to assist you with your request without this information.

Before deciding to call the Customer Service department, you should be sure you have checked all available online resources for answers to your questions. In many cases, the information you want is available to you 24 hours a day through our myCGS Web portal or IVR systems.

Customer Service Representatives can assist with the following:

Customer Service Representatives are not able to:

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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