On March 11, 2026, the U.S. Department of Justice announced that Aetna — a subsidiary of CVS Health — agreed to pay $117.7 million to settle federal fraud allegations. The government said Aetna submitted false diagnosis codes to Medicare to collect higher payments than it was entitled to, and then failed to correct those codes even when its own internal reviews flagged the problem.

This is not just an insurance company story. If your hospital treats patients enrolled in Medicare Advantage plans, you need to understand what this settlement means for your billing team, your documentation practices, and your legal exposure.

First: How Medicare Advantage Payments Work

Medicare Advantage — also called Medicare Part C — is the private-plan alternative to traditional Medicare. More than half of all Medicare beneficiaries are now enrolled in a Medicare Advantage plan. Rather than paying doctors and hospitals directly for each service, the federal government pays private insurers like Aetna, UnitedHealthcare, Humana, and others a fixed monthly amount for each enrollee. That amount goes up based on how sick the patient is.

To determine how sick a patient is, the insurer collects diagnosis codes from hospitals, doctors, and other providers. More diagnoses — and more serious diagnoses — mean higher payments from the government to the insurer.

This is called risk adjustment, and it makes sense in theory. Plans that cover genuinely sicker patients should be paid more. The problem is that it creates a financial incentive for insurers to make their patient populations look sicker on paper than they actually are. When that happens, it is called upcoding.

The Aetna Case: What Actually Happened

The government’s case against Aetna had two parts.

The larger part — $106.2 million of the settlement — involved a program Aetna ran in 2015. Aetna hired outside coders to comb through patient medical records obtained from providers. The goal was to find additional diagnoses that could be submitted to the government for higher payments. The coders found them. But those same chart reviews also revealed that some codes Aetna had already submitted were not supported by the medical records. Aetna added the new codes. It did not remove the unsupported ones.

The remaining $11.5 million resolved a separate set of allegations. Between 2018 and 2023, Aetna submitted or retained diagnosis codes for morbid obesity — a condition with strict clinical thresholds — for patients whose own recorded body mass index (BMI) did not qualify them for that diagnosis. A former Aetna billing auditor reported the practice to the government and filed a lawsuit under the False Claims Act. That employee will receive $2,012,500 from the settlement.

This Is Not an Isolated Case

The Aetna settlement is the third major federal action against a large Medicare Advantage insurer in just a few months, and the pattern is unmistakable.

In January 2026, Kaiser Permanente agreed to pay $556 million — the largest Medicare Advantage fraud settlement in history — to resolve allegations that it pressured physicians to add diagnoses to patient charts after appointments had already ended. Diagnoses the physician never addressed during the actual visit were added later to inflate the insurer’s payments. The scheme allegedly ran from 2009 through 2018 and generated approximately $1 billion in unsupported payments.

Shortly after, federal regulators formally notified Elevance Health (formerly Anthem) that it was being sanctioned for failing to properly correct unsupported diagnosis codes it had submitted from 2018 through 2025. Regulators found that Elevance had been submitting data corrections on encrypted USB drives rather than through the government’s required electronic systems — making it effectively impossible for auditors to verify or claw back overpayments.

These are not enforcement outliers. The Department of Justice has publicly stated that Medicare Advantage fraud is a top priority for aggressive False Claims Act enforcement. In the most recent fiscal year, DOJ collected more than $6.8 billion in False Claims Act recoveries — the largest single-year total in the law’s history. More than 80 cents of every dollar recovered came from healthcare cases.

Why Hospital Billing Departments Are at the Center of This

Here is what many hospital executives miss when they read these headlines: the medical records that insurers use to support their diagnosis submissions come from your hospital. Your physicians documented those encounters. Your coders assigned those codes. Your compliance team is responsible for the accuracy of that documentation.

When a Medicare Advantage plan runs a chart review program — exactly what Aetna did — it is reviewing records your organization produced. If an insurer submits or retains a diagnosis code that your records do not actually support, federal auditors will eventually trace that code back to the source documentation. That puts your team in the audit chain.

The government’s audit program for Medicare Advantage — called Risk Adjustment Data Validation, or RADV — has expanded significantly. CMS (the Centers for Medicare & Medicaid Services) is now on track to audit every Medicare Advantage contract annually and is working through a backlog of cases going back to 2018. Payment Year 2020 audits began in February 2026. New audit cycles are launching roughly every three months.

In a RADV audit, every diagnosis code submitted for risk adjustment must be backed by a medical record showing that the condition was actively managed during that visit — not just mentioned in a patient history, not carried forward from a previous year, but documented as a condition the physician monitored, evaluated, addressed, or treated during that specific encounter. Missing physician signatures, incomplete documentation of chronic conditions, and diagnoses listed in a patient’s history but not addressed during the visit are among the most common problems auditors find.

What Your Billing Team Needs to Know Right Now

The enforcement environment has changed materially. Here is what that means operationally.

Your documentation standards need to match audit standards. Chronic conditions like diabetes, heart failure, and COPD must be re-documented and shown as actively managed at each annual encounter — not just carried forward. If a condition is not addressed during a visit, it should not appear as an active diagnosis for that date of service. Billing and clinical documentation improvement (CDI) staff need to understand these rules as they apply to Medicare Advantage specifically, not just traditional Medicare.

Your response process for insurer chart review requests needs legal review. When a Medicare Advantage plan requests medical records as part of a chart review — the same type of program Aetna ran — your organization should have a clear process for evaluating those requests. What is being reviewed? For what purpose? Has your compliance team flagged any documentation concerns related to those records? Responding to a chart review without internal review of the documentation is a risk.

Unsupported codes you identify internally must be corrected. The Aetna case is a clear example of what happens when an organization’s own internal review identifies a problem and the organization does not fix it. Under federal law, if you identify an overpayment, you have 60 days to report and return it. Sitting on that knowledge creates False Claims Act exposure. If your billing audits have surfaced documentation issues that were never corrected, that needs to be addressed now.

Whistleblower risk is real and it comes from inside. Both the Kaiser and Aetna cases were brought to the government by employees — a physician in one case, a billing auditor in the other — who saw practices they believed were wrong and filed federal lawsuits. The False Claims Act allows private individuals to sue on the government’s behalf and collect a share of any recovery. A billing department employee who observes unsupported diagnosis coding, or who raises concerns internally and is discouraged or retaliated against, has the legal framework and financial incentive to go to the DOJ instead. 

What Is Changing in the Rules

The government is also closing the loopholes that enabled this conduct. In January 2026, CMS proposed that starting in 2027, Medicare Advantage plans will no longer be able to submit diagnoses identified through chart reviews conducted outside of a real clinical encounter. This is a direct response to the chart review programs that drove the Aetna and similar cases. If finalized, CMS estimates this change will reduce Medicare Advantage payments by more than $7 billion in 2027 alone.

Congress is moving in the same direction. Bipartisan legislation called the No UPCODE Act, reintroduced in March 2025, would go further by barring diagnosis codes sourced from both linked and unlinked chart reviews as well as health risk assessments. The Congressional Budget Office estimated it would save $124 billion over ten years.

These rule changes matter for hospitals because they will affect how Medicare Advantage plans calculate their payments — and therefore how aggressively they audit providers to protect their margins.

The Bottom Line for Hospital Leadership

The Aetna settlement is not the end of this enforcement wave. It is a marker in the middle of it. Every major Medicare Advantage insurer is under scrutiny. The audit infrastructure is in place, funded, and accelerating. The False Claims Act gives both the government and private whistleblowers powerful financial incentives to pursue violations.

Your hospital’s exposure in this environment comes from two directions: your own documentation practices, and your role as the record source for insurer chart reviews. Both require active management.

If your billing team has not done a documentation audit calibrated to Medicare Advantage risk adjustment standards, now is the time. If your compliance program does not have a clear protocol for responding to insurer chart review requests, it needs one. And if internal audits have surfaced unsupported codes that have not been corrected, that is a legal issue that should be reviewed with counsel immediately.

Sources & References

All links verified as of April 2026. Primary government sources are permanent; law firm and policy sources are subject to the respective organization’s web management. If a link is unavailable, search the source organization’s website using the title provided.

Primary Government Sources

1. DOJ Press Release — Aetna Settlement     U.S. Department of Justice, Office of Public Affairs, March 11, 2026. Authoritative source for all Aetna settlement figures, allegations, and whistleblower details. https://www.justice.gov/opa/pr/aetna-agrees-pay-1177-million-resolve-false-claims-act-allegations
2. DOJ Press Release — Kaiser Permanente Settlement U.S. Department of Justice, Office of Public Affairs, January 14, 2026. Primary source for the record $556M settlement, physician pressure allegations, and $1B in unsupported payments. https://www.justice.gov/opa/pr/kaiser-permanente-affiliates-pay-556m-resolve-false-claims-act-allegations
3. CMS Notice of Imposition of Intermediate Sanctions — Elevance Health Centers for Medicare & Medicaid Services, February 27, 2026. Formal 10-page sanction notice documenting Elevance’s seven-year noncompliance and the USB flash drive submission method. Primary source for characterizing this as a formal sanction, not merely a threat. https://www.cms.gov/files/document/elevancehealthsanction02272026.pdf
4. DOJ False Claims Act Statistics — FY2025     U.S. Department of Justice, January 2026. Primary source for the $6.8 billion FY2025 FCA recovery figure and 1,297 qui tam filings. https://www.justice.gov/d9/2026-01/fy2025_false-claims-act-statistics.pdf
5. HHS-OIG Work Plan — Medicare Advantage Risk Adjustment Audits HHS Office of Inspector General, ongoing series. Last modified March 12, 2026. Documents active RADV audit projects, completed audits, and audit scope. https://oig.hhs.gov/reports/work-plan/browse-work-plan-projects/w-00-24-35079/

Law Firm Analysis

6. Arnold & Porter — Aetna Settles; Government Intensifies MA Scrutiny Arnold & Porter Kaye Scholer LLP, FCA Qui Notes Blog, March 2026. Best secondary analysis of the two Aetna settlement agreements and what they signal for MA plans. https://www.arnoldporter.com/en/perspectives/blogs/fca-qui-notes/posts/2026/03/aetna-pays-settlements-government-intensifies-ma-scrutiny
7. DLA Piper — False Claims Act Year in Review: 2025 Trends DLA Piper LLP, February 2026. Covers the DOJ-HHS FCA Working Group relaunch, its six priority enforcement lanes (Medicare Advantage listed first), and enforcement outlook for 2026. https://www.dlapiper.com/en-us/insights/publications/2026/02/false-claims-act-year-in-review-2025
8. Foley Hoag — FCA Trends and Expectations for 2026 Foley Hoag LLP, March 4, 2026. Most current law firm analysis. Covers CMS’s CRUSH Rule proposal and expanded 2026 enforcement trajectory. https://foleyhoag.com/news-and-insights/blogs/white-collar-law-and-investigations/2026/march/false-claims-act-trends-and-expectations-for-2026/

Policy & Research Sources

9. Georgetown University CHIR — CMS Takes Aim at Upcoding: Ending Unlinked Chart Reviews Georgetown University Center on Health Insurance Reforms, Medicare Policy Initiative, February 4, 2026. Best plain-language analysis of the CY2027 proposed rule change eliminating unlinked chart reviews, with the $7 billion payment reduction estimate and No UPCODE Act background. https://medicare.chir.georgetown.edu/cms-takes-aim-at-upcoding-ending-unlinked-chart-reviews-in-medicare-advantage/
10. KFF (Kaiser Family Foundation) — Medicare Advantage Overpayment Analysis KFF Health Policy Research, 2025–2026. Independent, nonpartisan source for MA overpayment estimates. The MedPAC $76 billion figure is cited and analyzed here. KFF is an open-access alternative to MedPAC’s full report. https://www.kff.org/quick-take/medicare-advantage-insurers-will-see-higher-payments-as-cms-backs-off-a-key-payment-update/
11. Committee for a Responsible Federal Budget — CMS Takes Steps to Recover MA Overpayments CRFB, updated January 2026. Source for the $1.2 trillion 10-year MA overpayment projection and the 9.5% improper payment rate CMS estimate. https://www.crfb.org/blogs/cms-takes-important-steps-recover-overpayments-medicare-advantage