CGS Administrators, LLC
Government AdministrationTennessee, United States501-1000 Employees
CGS Administrators, LLC is a Nashville, Tennessee-based healthcare administrator with more than five decades of industry leadership. It operates within the Celerian Group, a BlueCross BlueShield of South Carolina consortium that serves government and private health plans navigating a changing marketplace. The company handles the full spectrum of healthcare administration activities, including claims processing, appeals management, call-center operations, and fraud prevention, and it maintains a sizeable workforce. Its client base includes CMS, where CGS holds multiple Medicare Administrative Contractor responsibilities across jurisdictions, including Jurisdiction 15 A/B/HHH MAC and DME MACs for Jurisdictions B and C. This multi-jurisdiction MAC experience supports its role in helping government programs and private plans manage evolving regulatory and payment landscapes. In March 2026 CGS Medicare launched the Advanced Beneficiary Notice Form.
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