Healthcare organizations participating in value-based care programs such as the Medicare Shared Savings Program (MSSP) or ACO REACH assume varying levels of financial responsibility for the cost of care delivered to their patient populations.

While these programs provide opportunities for shared savings, they also expose organizations to financial losses if healthcare spending exceeds CMS benchmarks.

To manage this risk, accountable care organizations often evaluate multiple financial protection mechanisms. These may include CMS risk protections built into program structures as well as private stop-loss or reinsurance solutions available through the commercial insurance market.

Understanding how built-in CMS protections differ from private stop-loss and reinsurance strategies can help ACO leadership teams make more informed decisions about financial risk management.

HCP National helps healthcare organizations evaluate stop-loss and reinsurance solutions designed to reduce catastrophic claims exposure across Medicare ACO models. Request a quote now.

CMS Program-Level Risk Protections

CMS accountable care models include program-level features designed to moderate financial exposure, though the specific mechanisms differ between MSSP and ACO REACH.

Examples may include:

Risk Corridors

In certain CMS models, risk corridors help limit the amount of savings or losses an ACO may experience relative to benchmark performance. These structures can help prevent organizations from facing unlimited financial exposure.

Shared Savings and Loss Limits

Depending on the program and participation track, CMS may establish limits on the percentage of gains or losses that an organization may experience in a given performance year.

Benchmark and Risk Adjustment Methodologies

CMS uses benchmark-setting and risk-adjustment methodologies to estimate expected spending and reconcile performance, with details varying by program.

These mechanisms help create a framework that encourages participation in value-based care while providing some protection against extreme financial outcomes. However, they do not eliminate claims volatility at the organization level.

Organizations comparing the two Medicare ACO models can also review our guide to ACO REACH vs MSSP.

Why Some ACOs Explore Additional Risk Protection

Although CMS program structures include protections designed to moderate downside exposure, healthcare organizations may still experience financial volatility due to unexpected claim patterns within their patient populations.

Examples include:

• Catastrophic medical cases
• Specialty drug treatments
• Complex surgeries
• Sudden shifts in patient utilization

For ACOs managing large populations, even a small number of high-cost claims can significantly affect overall financial performance. For organizations in advanced models, this type of claims volatility can create the same kinds of challenges discussed in our overview of the financial risks facing ACO REACH organizations.

As a result, some organizations evaluate additional financial risk protection strategies.

The Role of Stop-Loss Insurance and Reinsurance

Private stop-loss insurance and ACO reinsurance are financial mechanisms designed to limit exposure to unusually large claims or unexpected cost spikes.

In the context of accountable care organizations, these structures may provide reimbursement when medical costs exceed predetermined thresholds.

Potential advantages often considered include:

Protection Against Individual Catastrophic Claims

Specific stop-loss coverage may help protect against unusually high costs associated with a single patient.

Financial Stability

Reinsurance arrangements may help reduce financial volatility associated with unpredictable healthcare spending.

Strategic Risk Management

Some ACO leadership teams view private risk protection as a tool to support participation in advanced risk models.

Because each ACO has unique patient demographics and utilization patterns, the design of stop-loss or reinsurance structures is typically customized to the organization’s specific risk profile.

Evaluating Financial Risk Strategies for ACO Participation

When evaluating financial protection strategies, ACO leadership teams often consider several key factors:

• Patient population size and demographics
• Historical claims patterns
• Participation track within MSSP or ACO REACH
• Financial tolerance for claim volatility
• Long-term strategic goals for value-based care participation

Understanding the interaction between CMS program protections and private risk transfer options can help organizations make more informed decisions as they participate in advanced Medicare risk models.

Organizations evaluating private market options may also explore ACO REACH stop-loss insurance and reinsurance solutions tailored to their participation model.

Financial Risk Management in the Evolving ACO Landscape

As value-based care programs continue to expand, healthcare organizations are increasingly focused on balancing patient outcomes with financial sustainability.

While CMS program structures provide a framework for managing risk, many ACO leaders continue to explore a range of strategies designed to support long-term participation in accountable care models.

Organizations exploring stop-loss insurance or reinsurance strategies for MSSP or ACO REACH can contact HCP National to discuss risk protection options tailored to their ACO model. Request a quote now.