Dual-Eligible
An individual enrolled in both Medicare and Medicaid.
1 min read · Last reviewed May 23, 2026
At a glance
- Category
- Payer
- Primary sources
- 1
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Where this comes up
Front-office and billing both hit this term — eligibility before the visit, prior auth before the procedure, contract terms during fee-schedule negotiation, and credentialing whenever a new provider joins or a payer roster lapses. Misses here become denials downstream.
Full definition
What it is in practice
CMS Dual Eligible categorizes dual-eligibles by Medicaid benefit level. D-SNPs (Dual Special Needs Plans) are MA plans designed for dual-eligibles.
How it shows up in your practice
For QMBs, providers cannot bill the patient for Medicare cost-sharing — Medicaid is the secondary payer for those amounts, and balance-billing the patient violates federal law.
Sources
- CMS — Medicare Secondary Payerhttps://www.cms.gov/medicare/coordination-benefits-recovery/medicare-secondary-payer
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Open ask d3 →Related terms
- PayerMedicare Part C (Medicare Advantage)Medicare benefits delivered through private health plans contracted with CMS, often with additional benefits and a managed-care structure.
- PayerMedicaidJoint federal-state program providing health coverage to certain low-income individuals, families, pregnant women, elderly, and people with disabilities.
- PayerQMB (Qualified Medicare Beneficiary)A category of dual-eligible whose Medicare cost-sharing (deductibles, coinsurance, premiums) is paid by Medicaid.
D3rx is a healthcare-billing and compliance research aid maintained by D3rx Inc. Articles are drafted by an LLM (Anthropic Claude) against primary HHS, OCR, CMS, eCFR, NIST, and state-regulator publications, and reviewed for restraint and source fidelity by the D3rx team.
Reviewer status: a named credentialed reviewer (CHC, CHPC, or healthcare attorney) is being engaged. Until that engagement is finalized, this page does not claim credentialed review.
Related across the archive
- GlossaryQMB (Qualified Medicare Beneficiary)A category of dual-eligible whose Medicare cost-sharing (deductibles, coinsurance, premiums) is paid by Medicaid.
- GlossaryMedicaidJoint federal-state program providing health coverage to certain low-income individuals, families, pregnant women, elderly, and people with disabilities.
- GlossaryMedicare Part C (Medicare Advantage)Medicare benefits delivered through private health plans contracted with CMS, often with additional benefits and a managed-care structure.
- GlossaryCoordination of Benefits (COB)The rules and processes that determine which of two or more insurance plans pays first when a patient is covered by multiple plans.
- GlossaryMedicare Secondary Payer (MSP)Statutory rules at 42 USC 1395y(b) requiring other insurance to pay before Medicare in defined situations.
- GlossaryOA (Other Adjustment)An X12 adjustment group code used when no other group code applies — frequently for coordination of benefits and other payer adjustments.
- ComplianceOIG LEIE Monthly Exclusion Screening: Process + Audit-Ready LogsMonthly OIG LEIE and SAM.gov exclusion screening for every workforce member and vendor: the workflow, the log fields auditors require, and the escalation path.
- CompliancePECOS Provider Enrollment Verification (2026) — Quarterly ChecklistQuarterly PECOS provider enrollment verification workflow: who to check, the exact lookup steps, the audit log columns, and the revalidation escalation path.
This glossary entry is a research aid for billing and compliance staff. It does not provide legal, medical, or financial advice and does not replace counsel. References cited link to primary sources at HHS, OCR, CMS, eCFR, NIST, and the relevant payer or industry body.