Centene

Centene is the largest Medicaid managed care organization in the US, operating through state-specific brands rather than a single national name. Its marketplace products carry the Ambetter brand. For a practice, the operational fact is that you contract with the state plan, not the parent. Payer content ages fastest of anything on this site. Portals move, forms change, payer IDs get reassigned, and timely filing limits are contract-specific regardless of what any table says. Treat this page as orientation; the payer’s own current documentation and your executed contract are authoritative. Checked August 2026.

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Who they are

Enroll with the state plan. Centene operates under different brand names in different states — Peach State Health Plan, Sunshine Health, Superior HealthPlan, Buckeye Health Plan, and many others. Your contract is with the state entity, and a contract in one state does not extend to another.

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The two-layer Medicaid problem

Contracting with Centene’s state Medicaid plan is in addition to enrolling with the state Medicaid agency, not instead of it. See Enroll in state Medicaid.

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Enrollment and credentialing

Through the state plan’s provider site. Many states use a single credentialing verification organization for all Medicaid MCOs — check whether yours does, because it materially reduces the work.

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EDI, ERA, and EFT

Per state plan. Payer IDs differ per state brand.

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Appeals

Plan appeal, then the state fair hearing process. Medicaid appeal rights differ from commercial and are governed by state and federal Medicaid regulation.

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Quirks worth knowing

• Rates are Medicaid rates — generally the lowest of any payer. Model contribution margin including administrative cost before committing.
• Magellan Healthcare handles behavioral health for some plans — a carve-out requiring separate contracting
• Ambetter marketplace plans are a different product from the Medicaid plans, with different rates and separate contracting
• Administrative burden is high relative to reimbursement; this is a real business decision. See Enroll in state Medicaid.