What Is a Managed Care Organization (MCO)?

A Managed Care Organization (MCO) is a type of health plan or company that oversees the provision of healthcare services for its members. This structured approach to healthcare delivery has become the dominant form of health insurance in the United States, used widely in the private sector and government programs like Medicaid and Medicare Advantage. The core mission of an MCO is to address the increasing cost of medical care by managing how, when, and where services are delivered, balancing affordability with quality patient outcomes.

Defining Managed Care Organizations

MCOs represent a fundamental shift away from the traditional fee-for-service system, where providers are paid for every service performed, often incentivizing higher volumes of care. Managed care integrates the financing and delivery of healthcare services through contractual relationships with a network of medical professionals and facilities. This integrated system focuses on coordinated care and financial sustainability to ensure predictable costs.

The underlying philosophy of an MCO involves risk sharing, where the organization takes on the financial responsibility for providing care to a defined population. For example, the MCO often receives a fixed payment per member per month, known as capitation, regardless of how many services the member uses. This structure incentivizes MCOs to focus on preventive care and efficient resource allocation rather than generating more medical bills.

Core Strategies for Care Management

To manage costs and ensure appropriate utilization of services, MCOs employ several specific mechanisms that influence how patients receive care.

Provider Networks

One common strategy is the creation of a Provider Network, which is a group of doctors, hospitals, and specialists who have agreed to furnish services at negotiated, discounted rates. Requiring members to use these in-network providers allows the MCO to leverage its large membership to control the cost of services.

Utilization Review

Utilization Review involves the MCO reviewing and approving specific medical services before they are rendered. This is often done through prior authorization or pre-certification requirements for expensive procedures, hospital admissions, or specialty medications. The purpose of this review is to ensure that the proposed treatment aligns with evidence-based practices and meets medical necessity criteria, thereby preventing unnecessary spending.

Primary Care Physician (PCP) Gatekeepers

Many MCO plans use a Primary Care Physician (PCP) as a Gatekeeper to manage access to the broader healthcare system. The PCP coordinates all of the patient’s care and must issue a referral before the patient can see a specialist or receive advanced services. This mechanism helps guide members toward appropriate care settings and prevents self-referral to costly specialists.

Primary Models of MCOs

The structure of managed care is organized into various plan types, which differ primarily in flexibility, cost, and rules for accessing care.

Health Maintenance Organization (HMO)

The HMO model is the most restrictive but typically offers the lowest out-of-pocket costs. HMOs require members to choose a PCP who acts as the gatekeeper. Care is generally covered only if it is received from providers within the plan’s specific network, except in emergency situations.

Preferred Provider Organization (PPO)

The PPO model offers members significantly more flexibility in choosing their doctors and hospitals. PPO members are not required to select a PCP and can see specialists without a referral. While PPO plans have a network of preferred providers, they allow members to seek care outside of that network for a higher out-of-pocket cost.

Point-of-Service (POS)

The POS plan operates as a hybrid, combining features of both the HMO and the PPO structure. POS plans typically require members to select an in-network PCP to coordinate their care. However, members also retain the option to receive services from out-of-network providers, but they must pay a substantially higher share of the cost to do so.