Court Heard Arguments on Medicare Advantage Audit Rule
Insurers monitoring the appeal should prepare for potential changes to how government audits impact plan liability.
Updated on Oct. 5, 2026 in Healthcare
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A federal appeals court heard oral arguments regarding a challenge to the risk adjustment data validation (RADV) rule. The case follows a 2025 ruling that initially invalidated the regulation governing Medicare Advantage audits.
Why it matters
The outcome of this appeal will determine the regulatory framework for audit oversight and liability for Medicare Advantage insurers. Companies must weigh the potential for increased audit exposure against existing operational standards as the litigation continues.
Humana, identified as the second largest Medicare Advantage insurer, initiated the challenge against these audit rules. The litigation represents a significant test of the Department of Health and Human Services' authority to set oversight standards for the industry.
The players
Humana
A major national health insurance provider that holds a top-tier market share in the Medicare Advantage sector.
Department of Health and Human Services
The federal department responsible for the oversight of public health and the administration of federal healthcare programs like Medicare.
U.S. Court of Appeals for the Fifth Circuit
A federal judicial body that hears appeals from district courts within its jurisdiction and sets legal precedents for those states.
The details
The lawsuit centers on the insurer's claim that the final version of the RADV rule diverged significantly from the original proposal, depriving stakeholders of a fair opportunity to provide input. By invalidating the rule, the lower court signaled potential procedural flaws in the agency's rulemaking process. If the appellate panel overturns or upholds the lower court, it will reset the compliance threshold for how plans document risk-adjusted payments and defend their data during government reviews.
Timeline
2023: Humana filed the lawsuit against the government.
September 2025: A federal judge invalidated the RADV rule.
November 2025: HHS appealed the invalidation of the RADV rule.
October 5, 2026: The court held oral arguments for the appeal.
Market Landscape
This case follows a pattern of heightened scrutiny regarding the implementation of the risk adjustment data validation (RADV) rule. The litigation serves as a test of the administrative procedures used to reform oversight of federal healthcare programs.
Operators in the insurance sector should track the appellate decision as a signal for future audit vulnerability and compliance requirements. Businesses should coordinate with counsel to review how their current data validation processes align with the contested administrative standards.
The takeaway
The appellate court's final decision will clarify the degree of administrative deference permitted in Medicare oversight changes. Ensure your compliance team is prepared to pivot procedures if the appellate court reinstates the rule as initially proposed.
Further reading
For more on the industry's changing regulatory landscape, read our coverage on Healthcare.
Source note: This article includes information reported by STAT.
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