For years, many accountable care organizations struggled with benchmark structures that made sustained performance difficult. Perform well, and your bar gets harder next year. Invest in care management, and the financial goalposts shift before you see the return. The CMS LEAD Model Long-term Enhanced ACO Design is CMS’s direct response to that broken cycle.
LEAD is a voluntary accountable care program that has been developed as a 10-year program to replace ACO REACH, beginning January 1, 2027. This change represents a structural shift in how CMS designs accountable care programs. If your organization currently participates in ACO REACH or is evaluating its first ACO program, understanding what changed will help you make an informed decision before the March 2026 application window opens.
The Problem With ACO REACH
ACO REACH had a fundamental design flaw that undermined its own goals. The higher an organization performed, the more difficult CMS made the benchmark the next year, a trend referred to as the ratchet effect. It was silent on rewarding high performers and discouraged long-term investment in care infrastructure.
The Ratchet Effect
When benchmarks reset annually based on prior performance, organizations couldn’t justify multi-year spending on care management teams, data systems, or population health programs. The savings generated today became the baseline to beat tomorrow. LEAD addresses this by introducing a long-term benchmarking approach designed to reduce frequent rebasing and provide more predictable performance targets.
Core Changes the CMS LEAD Model Introduces
LEAD is not an extension of ACO REACH. It is a new model that replaces REACH beginning in 2027. The structural changes are substantive and focus on the very areas of friction that prevented providers from investing in value-based care wholly.
Stable 10-Year Benchmarks
The most significant change is also the most straightforward. Under the CMS LEAD Model, benchmarks don’t reset. Participants enter with a fixed target that holds for a decade. This one shift changes the entire investment calculus. Organizations can finally build multi-year care management strategies with real financial confidence.
CARA and Specialist Integration
Previously, bringing specialists into an ACO’s risk arrangement required bilateral contracting between each ACO and each specialist group, a process so administratively heavy that most ACOs avoided it entirely.
LEAD introduces CARA (CMS Administered Risk Arrangements), which moves that burden to CMS. CARA introduces a CMS-supported framework that simplifies episode-based risk arrangements between ACOs and specialists. Coordinated, multi-specialty care becomes operationally realistic for the first time.
Support for Small Practices and Rural Providers
ACO models have historically favored large health systems with existing infrastructure. LEAD specifically addresses this with targeted support for:
- Small independent physician practices
- Rural providers and critical access hospitals
- Federally Qualified Health Centers (FQHCs)
- Safety-net organizations serving underserved Medicare populations
These policies provide operational and financial support that lowers participation barriers for organizations that previously struggled with the entry costs of risk-based models.
Two Risk Tracks
LEAD offers two participation options based on your organization’s financial readiness:
- Global Risk Track: Full upside and downside risk for the total cost of care
- Professional Risk Track: Upside risk plus partial downside, with CMS retaining more financial exposure
What This Means for ACO REACH Participants
Current ACO REACH participants are not automatically transitioned into LEAD. Participation in LEAD requires submitting a new application. Existing care management programs, data systems, and beneficiary engagement processes may still be relevant. However, the financial structure and benchmarking approach are different enough to require a fresh evaluation.
The actual question is whether your organization possesses the data structure, manpower, and financial resources to be committed to a 10-year accountable care program and deliver on it regularly.
Final Thoughts
The shift from ACO REACH to the CMS LEAD Model corrects structural problems that held value-based care back for years. Stable benchmarks, CARA, and dedicated support for smaller providers create a foundation that simply didn’t exist before. Applications open in March 2026. Organizations should begin evaluating their readiness before the application window opens.
Persivia offers a connected digital health platform that brings population health analytics, care management, risk adjustment, and quality reporting into one unified environment. The platform provides ACOs with data visibility and operational workflows to manage beneficiary attribution, care coordination, and financial performance within long-term value-based care models.