Medicaid MCO
Medicaid Managed Care Organization
A managed care organization contracted by a state to deliver Medicaid benefits.
1 min read · Last reviewed May 23, 2026
At a glance
- Category
- Payer
- Acronym for
- Medicaid Managed Care Organization
- Primary sources
- 1
- Workspace handoff
- ask d3 →
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
States contract with MCOs to manage Medicaid for defined enrollee populations. Each state's MCO landscape is distinct; provider enrollment and credentialing are separate from fee-for-service Medicaid.
How it shows up in your practice
Negotiate fee schedules and pay attention to denial patterns by MCO. MCOs typically apply tighter prior-authorization rules than fee-for-service Medicaid.
Sources
- CMS — Medicare Administrative Contractorshttps://www.cms.gov/medicare/coding-billing/medicare-administrative-contractors-macs
Look up MCO contract details in Ask D3
Open ask d3 →Related terms
- PayerMedicaidJoint federal-state program providing health coverage to certain low-income individuals, families, pregnant women, elderly, and people with disabilities.
- PayerPrior AuthorizationPayer requirement that the practice obtain approval before delivering certain services, procedures, or drugs.
- PayerDual-EligibleAn individual enrolled in both Medicare and Medicaid.
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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
- GlossaryMedicaidJoint federal-state program providing health coverage to certain low-income individuals, families, pregnant women, elderly, and people with disabilities.
- GlossaryDual-EligibleAn individual enrolled in both Medicare and Medicaid.
- GlossaryPrior AuthorizationPayer requirement that the practice obtain approval before delivering certain services, procedures, or drugs.
- GlossaryCHIP (Children's Health Insurance Program)State-administered federal program providing health coverage to children in families with incomes too high for Medicaid but too low for private coverage.
- GlossaryFPL (Federal Poverty Level)Annual income thresholds published by HHS used to determine eligibility for federal programs.
- GlossaryMAC LCD ArticleA Local Coverage Article published by a MAC to provide billing, coding, or coverage clarification that does not rise to the formal LCD.
- GlossaryMedicare Administrative Contractor (MAC)CMS-contracted regional entity that processes Medicare claims, makes coverage decisions, conducts provider education, and handles first-level appeals.
- 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.
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.