By Angela Troccoli, Head of Marketing at Revecore

If you read our recent analysis of Aetna’s Level of Severity (LLS) inpatient payment policy, you know what’s at stake. For one-to-four midnight stays, Aetna is now repricing approved inpatient admissions outside your contract, using proprietary MCG criteria that CMS does not sanction — and posting the result as paid. There is no denial code. There is no standard appeal. The claim looks closed. 

It’s a disruptive policy. But it’s not a new playbook. 

Payers have been quietly engineering payment reduction strategies for years; severity downgrades, hidden denials, authorization-adjacent adjustments that sidestep regulatory scrutiny. We’ve seen it before, and we’ll see it again. What matters is whether your recovery partner is positioned to detect it, respond to it, and prevent it from becoming a permanent drag on your revenue. 

At Revecore, we’ve made that investment deliberately and systematically.  

Underpayments Are Not Getting Better 

Medicare Advantage claim denials rose 55.7% between 2022 and 2023, according to the American Hospital Association. A peer-reviewed Health Affairs study found initial denial rates of 17% across MA-submitted claims, and that figure likely understates the true impact because partial adjustments, including DRG downgrades, weren’t even captured. To add context, at some health systems, DRG downgrades affect up to 10% of inpatient discharges. 

Initial denial rates across all payers reached 11.81% in 2024 — a 2.4% increase year-over-year — according to Kodiak Solutions benchmarking data. Meanwhile, accounts receivable over 90 days hover near 36% for average-performing health systems, well above the 15–20% benchmark. With Medicare paying hospitals just 82 cents for every dollar spent on care, plus commercial payer error rates reported at nearly 19% by the American Medical Association, the financial pressure is real. It’s no wonder that 20 hospitals, health systems and healthcare organizations either entered or exited bankruptcy protection in 2025. 

When you consider the broader denial and underpayment environment, this makes Aetna’s recent move even more impactful. But there’s hope. The organizations that are reversing these trends share a common trait: they’ve invested in intelligent, adaptive recovery infrastructure. So have we — on behalf of every client we serve. 

How Revecore Is Purpose-Built to Respond 

Aetna’s LLS policy is exactly the kind of emerging payer tactic that our technology and clinical infrastructure were designed to surface.  

Our proprietary technology platform allows non-technical reimbursement experts to build executable detection rules without writing a line of code. When a new payer tactic emerges, our team translates it into a recoverable opportunity — typically far sooner than rules-based systems dependent on established data patterns. That speed is a differentiator that our clients feel directly.  

“What I like about having Revecore for their audit and recovery services, as well as their reviews on the zero-pay accounts, is that they also capture things that might not be covered, and they go through and find whether those are actually payable. When we get with different payers, there are different contract rules and policies by payer, and sometimes people get in the mindset that a given code is always bundled with a certain thing, but policies change.  

When we have employees who are productivity driven and say that they can’t stop to research, they start to do things by memory. What is great about Revecore is that if there is something we can write off as an unbundled service, they tell us that a payer changed some policies and that we should be getting reimbursed for that. It is really great that they capture and collect revenue for any missed opportunities on our staff members’ part.” 

— Director, March 2026, collected by KLAS Research 

 We are actively tracking Aetna Medicare inpatient severity downgrades as claims come in, ready to build and deploy specific detection rules within our proprietary platform at a moment’s notice. 

Beyond the Aetna-specific rules, here’s what powers our broader response: 

• National payer intelligence at scale. Our system processes more than 125 million claims each year. That volume means we see emerging payer behavior patterns — often before individual clients do. Aetna’s LLS approach isn’t isolated; it’s a signal of where MA utilization management is heading. We’re tracking that trajectory. 

• Machine-learning prioritization. Our AI-enabled prioritization engine dynamically adapts as payer behavior shifts, surfacing the highest-value recovery opportunities from a continuous stream of claim data — not just the high-dollar outliers that traditional tools flag. 

• Specialized clinical expertise. Revecore employs dozens of expert teams across clinical domains — including registered nurses and certified coders — who medically validate claims before any recovery action is taken. With LLS, where the clinical story at admission is the primary defense, this validation layer is essential. 

• Closed-loop feedback. Every recovered claim feeds back into our detection logic. As we resolve LLS adjustments, the patterns we encounter continuously sharpen our ability to identify the next wave — whether it’s another Aetna tactic or a similar strategy adopted by a different MA plan. 

Recovery is the floor, not the ceiling. The deeper value we provide is prevention intelligence — helping our clients understand where underpayments are originating, which payers are most aggressive, and how to adjust upstream processes to reduce exposure before it materializes. 

The Strategic Signal: This Isn’t Over 

Aetna’s LLS policy is worth watching not only for its direct financial impact, but for what it signals about the direction of MA utilization management. If the policy survives legal and regulatory scrutiny, other plans will be watching closely. The same mechanics that allow Aetna to quietly reduce inpatient reimbursement today, without triggering formal denial protections, could be adopted more broadly across the industry. 

Health systems that build monitoring, documentation, and recovery infrastructure now will be better positioned to respond to Aetna’s current policy and to whatever comes next. That’s precisely why we’ve made the investments we have. 

Payers will keep changing the rules. We’ll keep adapting and bringing our clients with us.