If your panel skews toward high-cost or high-needs Medicare patients, the model replacing ACO REACH was built with you in mind.
Providers spending higher than the regional average on patient care, and those who care for Medicare’s most complex patients, have historically had less incentive to participate in Medicare ACO programs. Providers with a higher spending practice compared to their region, and those serving a larger than average proportion of high-needs patients, may have looked at ACO REACH or the Shared Savings Program and concluded the math didn’t work, no matter how well they managed care.
That calculus changes in 2027. CMS is replacing ACO REACH with the Long-term Enhanced ACO Design (LEAD) Model, and several of its design choices directly favor practices serving high-cost and high-needs populations. Here is what is different, and why it matters:
The Old Benchmark Math Worked Against High-Cost Practices
Under ACO REACH, an ACO whose patients spent more than the regional average took a downward hit to its benchmark. The target was pulled toward regional norms, which set a higher bar for savings in the practices treating the most expensive patients. The Shared Savings Program carried similar dynamics.
Under LEAD, ACOs with spending below regional average still receive an upward benchmark adjustment, but ACOs with spending above the regional average do not face a benchmark penalty. Additionally, higher spending ACOs receive an Administrative Add-On payment and, in the Global program, a lower CMS savings “discount rate” giving practices a several percentage point head start on their ability to show savings relative to regionally efficient practices.
High-Needs Patients Are No Longer Walled Off Into a Separate Track
High-needs patients drive a large portion of spending, and that spending is hard to predict accurately. Risk adjustment, based on a subset of patient conditions, is meant to help adjust benchmarks based on the acuity of an ACO’s specific patient population.
In a standard ACO, every patient’s risk score is set on the prior year’s diagnoses. This works for stable patients managing chronic conditions, but for high-needs patients with spiking CMS performance year costs from an acute crisis, a rapid decline, or end-of-life care; last year’s diagnoses do not capture this year’s reality.
LEAD applies a current-year, or “concurrent,” risk model that captures those rapidly escalating costs in the performance year and will better measure an ACO’s ability to manage care and generate savings for high acuity patients. For physicians managing patients with high needs, current-year documentation now sets the risk score and adjusts the benchmark to account for that additional care provided.
What It Means for Your Practice
For practices with higher spending compared to their region, or with a higher share of complex and high-needs cases, LEAD holds some structural advantages over the REACH model. The removal of the negative benchmark adjustment, the 1.5% Add-On, and current-year risk adjustment for high-needs patients all give such practices a head start on demonstrating savings. To take full advantage of what LEAD offers, practices need the right infrastructure, data, and support. That’s where Vytalize comes in, with our Apex and Optimal programs.
Vytalize partners with practices to assess best program fit and provides a comprehensive support system, seamless EMR integration, evidence-based clinical recommendations at the point of care and an innovative financial model that rewards high-quality care.
Want to see where your practice stands for 2027? Schedule a call and we’ll walk through how LEAD and MSSP compare for your patient population.
Source: CMS, Long-term Enhanced ACO Design (LEAD) Model Request for Applications (April 23, 2026). Benchmark, risk adjustment, and Administrative Add-On provisions summarized above are drawn from the RFA's financial methodology sections.
