A Medicaid Managed Care Organization, or MCO, is a health insurance plan that contracts with a state government to deliver Medicaid benefits to enrolled members. Instead of the state paying doctors and hospitals directly for each service, it pays the MCO a fixed monthly amount per person. The MCO then builds a network of providers, coordinates care, and covers the medical services each member needs. About 70 percent of all Medicaid beneficiaries were enrolled in an MCO as of 2019, making this the dominant way Americans receive Medicaid coverage.
How the Payment Model Works
The key feature of an MCO is something called a capitation payment. Each month, the state pays the MCO a set dollar amount for every person enrolled, regardless of whether that person visits a doctor zero times or ten times. This monthly per-member fee is calculated by actuaries who estimate the expected healthcare costs of the enrolled population, plus administrative costs and a margin for the plan’s reserves and profit. The rates are locked in for a 12-month period and don’t change if costs spike unexpectedly.
This structure shifts financial risk from the state to the MCO. If members use fewer services than projected, the MCO keeps the difference. If members use more, the MCO absorbs that cost. This gives MCOs a strong incentive to keep their members healthy and to catch problems early, since preventive care is far cheaper than emergency treatment.
MCOs vs. Fee-for-Service Medicaid
The older model of Medicaid, called fee-for-service, works like a tab at a restaurant. Each time you see a doctor, get lab work, or fill a prescription, the state pays the provider directly for that specific service. There’s no single organization coordinating your care or managing costs across all your needs.
In a managed care arrangement, the MCO acts as an intermediary. You’re enrolled in a plan, assigned or allowed to choose a primary care provider within that plan’s network, and the MCO handles payment to providers on the state’s behalf. The intended advantage is better care coordination: your MCO tracks your prescriptions, specialist visits, and hospitalizations in one place, which can reduce duplicated tests, conflicting medications, and gaps in follow-up care. In practice, the tradeoff is that you typically need to use providers within your plan’s network, and some services may require prior authorization.
A few states still rely heavily on fee-for-service or use limited managed care models. North Dakota, for example, operates a primary care case management program where enrollees have a designated primary care provider who coordinates basic care but the state still pays providers individually. Some states like Utah and Massachusetts use managed care only for specific services like behavioral health or medical transportation rather than comprehensive coverage.
What an MCO Covers
MCOs are required to cover the same mandatory Medicaid benefits that any state Medicaid program must provide under federal law. These include inpatient and outpatient hospital services, physician visits, lab and X-ray services, family planning, transportation to medical appointments, and comprehensive screening and treatment services for children (known as EPSDT).
Beyond the basics, many MCOs offer additional benefits that states choose to include in their contracts. Common extras include prescription drugs, dental care, eyeglasses, hospice, personal care services, and case management. Some MCOs go further with “value-added” benefits not required by the state, such as gym memberships, over-the-counter health products, or meal delivery after a hospital stay. These extras vary significantly from one plan to another, which is one reason choosing the right MCO matters.
How to Choose an MCO
In most states that use managed care, you’ll be asked to pick from two or more MCO plans when you enroll in Medicaid. If you don’t choose, you’ll typically be auto-assigned to one. The most important factor is whether your current doctors, specialists, and preferred pharmacy are in the plan’s provider network. Switching plans later is possible but usually limited to specific enrollment periods.
Other things worth comparing include the plan’s drug formulary (which medications are covered and at what cost-sharing level), whether it covers dental and vision, how far you’d need to travel to reach in-network providers, and any extra benefits the plan offers. States are required to set network adequacy standards, meaning your MCO must have enough providers within a reasonable distance of your home. A common benchmark is access to a primary care provider within 30 miles or 30 minutes of where you live, though standards vary by state and provider type.
Starting in late 2028, states will be required to publish quality ratings for their Medicaid MCOs on a public website. These ratings will use a standardized set of 16 quality measures established by the federal government, covering areas like preventive care, chronic disease management, and patient experience. The ratings will also be broken down by race, ethnicity, sex, and other demographics. This is designed to give you a way to compare plans the way you might compare star ratings for Medicare Advantage plans today.
How MCOs Are Regulated
MCOs operate under contracts with state Medicaid agencies, but they’re also subject to federal oversight. The Centers for Medicare and Medicaid Services (CMS) sets baseline rules that every state’s managed care program must follow, covering everything from how capitation rates are calculated to what services must be included.
States are required to conduct external quality reviews of their MCOs, including validation of the plan’s provider network to ensure it meets adequacy standards. If an MCO’s network is too thin in a particular area or specialty, the state can require corrective action. MCOs also must report on quality metrics, and states use this data to hold plans accountable for the care they deliver.
Behavioral Health and Emerging Priorities
One area where MCOs are evolving rapidly is behavioral health. States are increasingly using their managed care contracts to integrate mental health and substance use treatment into the broader care coordination that MCOs provide. Several states, including Arizona, Arkansas, Florida, New York, and North Carolina, have developed specialty plan models specifically designed to address behavioral health needs within their Medicaid managed care systems. These models use a mix of care coordination requirements and payment incentives to push MCOs toward better outcomes for members with serious mental illness or addiction.
States have also explored using MCOs to address non-medical factors that affect health, such as housing instability, food insecurity, and transportation barriers. Federal guidance on covering these health-related social needs has shifted in recent years, and CMS currently reviews state requests to cover such services on a case-by-case basis rather than through a standardized framework. The degree to which your MCO addresses these broader needs depends heavily on your state’s contract with the plan.