Payer Audits, Denial Amounts Rise Again in 2025, Vendor Data Show

Fierce Healthcare's reporting on vendor data showing that payer audits and post-payment recoupment amounts continued to increase in early 2025 — with Medicare Advantage denial rates up 4.8 percent year-over-year — signals an escalation in payer behavior that physician practices need to anticipate and prepare for. The combination of rising denial rates and increasing audit activity creates a two-front challenge: practices must both appeal more denials and defend more paid claims from retroactive recoupment. For practices without systematic tracking and documentation, this environment represents a significant financial risk.

The Audit Escalation

Payer audits — retrospective reviews of claims that were previously paid — have been increasing in both frequency and scope. When a payer audits a claim and determines that payment was not warranted, it initiates a recoupment process to recover the funds. These recoupments can be devastating for practices because they claw back revenue that the practice has already recognized, spent, and often distributed as physician compensation.

The rising audit activity reflects several factors:

• Payers investing in data analytics to identify claims patterns they believe indicate overpayment or billing errors
• Increased regulatory scrutiny of MA plans creating pressure on those plans to demonstrate cost containment through audits
• Post-COVID volume recovery generating a surge in claims that provides a larger audit target
• The financial incentive for payers to recover payments retroactively, particularly when provider appeal rates for recoupments are low

The Denial Rate Increase

The 4.8 percent year-over-year increase in MA denial rates, coming on top of already elevated baseline denial rates, compounds the audit challenge. Practices are simultaneously dealing with more initial denials requiring appeal and more post-payment audits requiring defense. Each demands different but overlapping capabilities: initial denials require evidence-based appeal strategies; audit recoupments require documentation demonstrating that the original claim was properly coded, documented, and billed.

The convergence of these trends means that the total administrative burden on practices is increasing from both directions. The pre-payment denial rate determines how much effort is needed to get paid. The post-payment audit rate determines how much effort is needed to stay paid. Both are trending upward.

Documentation as Defense

In an environment of rising audits and recoupments, clinical documentation serves a dual purpose: it supports the initial claim submission and it defends against retroactive challenge. Documentation that is sufficient to get a claim paid may not be sufficient to withstand a post-payment audit conducted months or years later. Auditors apply detailed criteria and have the benefit of reviewing the full clinical record at leisure, compared to the real-time clinical environment in which the documentation was created.

Practices should consider audit defense as part of their documentation strategy, not an afterthought. This means ensuring that clinical notes clearly document medical necessity, that coding reflects the documented level of service accurately, and that the clinical record tells a coherent story that supports every element of the billed service. These are the same documentation principles that reduce initial denial rates, but they take on additional urgency when the risk of retroactive recoupment is increasing.

What Practices Should Do

The rising audit and denial environment demands proactive preparation:

• Track not just denial rates but audit frequency and recoupment amounts by payer
• Maintain documentation standards that support both initial payment and audit defense
• Respond to audit findings within required timelines — missed deadlines result in automatic recoupment
• Analyze audit findings for patterns that suggest systemic coding or documentation issues addressable through education and process improvement
• Know your appeal rights for recoupment demands — payers must follow specific processes, and improper recoupment can be challenged

The data is clear: payers are becoming more aggressive on both fronts — denying more claims upfront and auditing more paid claims retroactively. Practices that build the infrastructure to manage both sides of this challenge protect revenue that would otherwise be lost or reclaimed. Those operating without systematic tracking and documentation are exposed to a growing financial risk from two directions simultaneously.