LEAD (Long-term Enhanced ACO Design) is CMS’s next-generation ACO model for Traditional Medicare. It provides a stable 10-year framework for providers to manage total cost of care and quality for aligned Medicare beneficiaries.
Why the New Approach?
CMS’ previous ACO models have demonstrated meaningful progress in reducing hospitalizations, emergency department visits, and other avoidable high-cost care episodes through better coordination and accountability. However, these earlier versions were not well designed for smaller, rural, independent practices or providers serving high-need populations, which has limited broader participation.
The new LEAD model aims to address those gaps by introducing more inclusive benchmarks, prospective payments, and policy innovations that level the playing field for those caring for complex patients, enabling them to succeed in value-based arrangements and deliver more coordinated, cost-effective care. However, as of late March 2026, CMS has yet to release full details on the benchmarking rules, risk adjustment model, and payment mechanics. As with any value-based program, the fine print will ultimately determine who wins — and providers who invest in understanding it early will have a meaningful advantage.
A Broader Participant Mix than Prior Models
LEAD can now support ACOs operating in traditional Medicare such as independent physician groups, rural and smaller practices -- organizations that want more risk than Medicare Shared Savings Program. It reflects CMS’s conclusion that accountable care works, but only when providers have predictable benchmarks, time to invest, and reduced rebasing risk. This is CMS’s attempt to “finish the job,” by making accountable care the default rather than a temporary experiment.
What LEAD Is, and Is Not
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LEAD is:
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LEAD is not:
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How LEAD Fits with Other CMS Models
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LEAD and ACCESS are not substitutes. They target different incentives and mechanics.
LEAD vs. ACO REACH - Side-by-Side Comparison
How Payment Works (What’s Known)
While exact benchmark methodology, risk corridors, quality scoring details, and advance payment mechanics have not been finalized, CMS has confirmed that LEAD is:
- Built on shared savings / shared losses with two voluntary risk-sharing options:
- Global Risk: Eligible to receive up to 100% of their savings and liable for up to 100% of total losses relative to their established performance benchmark.
- Professional Risk: Eligible to receive up to 50% of total savings and liable for up to 50% of total losses relative to their established performance year benchmark.
- Long-term design aims to reduce rebasing churn
- Performance measured at the population level
- CARA, CMS Administered Risk Arrangement, will help facilitate the creation of episode bundles between the PCP and specialists, with a fall prevention program.
What LEAD Signals
While LEAD is currently voluntary, CMMI has set an objective that 100% of Medicare dollars will be flowing through some type of risk arrangement by 2030. It is possible that LEAD participation, or another form of Alternative Payment Model participation, may be mandated in the near future.
How to Succeed Under LEAD
LEAD introduces a level of actuarial and financial sophistication that is the foundation for Actuarial AI-enabled infrastructure. With its emphasis on claims-based benchmarking, population-level reconciliation, long-horizon actuarial modeling, and contract performance analytics, the most successful financial performance in LEAD will require providers to actively forecast, measure, and optimize their performance under risk.
LEAD presents a true actuarial surface area, demanding rigorous benchmark modeling, forward-looking reconciliation, and disciplined interpretation under CARA-aligned frameworks.
Arbital Health is uniquely positioned to help providers operationalize these requirements with Actuarial AI, turning complex modeling and financial accountability into actionable insight that supports confident participation and long-term success under LEAD.
