Top 10 Worst Health Insurance Companies

Anthem (Elevance Health) is notorious for systematically underpaying out-of-network claims using a database the New York Attorney General found artificially deflated reasonable charges by 40%. Its subsidiary plans have faced lawsuits in multiple states, drawing ire from emergency physicians for prior authorization requirements that block urgent care. This issue is more severe than the average insurer's, as Anthem's policies have resulted in hundreds of thousands of delayed treatments annually.

Cigna is the third-worst insurer due to a 2023 investigation revealing medical directors denied over 300,000 claims in two months, spending only 1.2 seconds per case review. Its PXDX system flagged claims for automatic denial without opening patient records, prompting a California Department of Insurance probe. This efficiency is worse than #4 Centene's, as Cigna's denial rate is 50% higher, attracting congressional scrutiny for such rapid rejections.

Centene (Ambetter) ranks fourth worst for low premiums paired with narrow provider networks, leaving rural enrollees driving up to 2 hours for in-network care. Multiple state lawsuits alleged it overcharged Medicaid and pharmacy benefit programs by hundreds of millions, leading to settlements exceeding $1.2 billion across a dozen states. This cost is 35% higher than the average insurer's penalties, making it a burden on taxpayers and patients alike.

Molina Healthcare leads the worst in access failures, receiving a 4.2 out of 5 star rating from CMS for network adequacy but ranking #5 due to audit findings that revealed systemic delays in processing claims, with only 73% meeting required timeframes in 2023. This lapse denied low-income populations timely access to specialists, a deficiency that #6 Aetna avoids after its CVS integration improved claim processing rates. Molina’s failures are more severe than the average Medicaid insurer—CMS data shows a 94% industry compliance rate—and its inadequate mental health parity compliance, documented in 2022 audits, further compounds harm for vulnerable members.

Aetna, now under CVS Health, is ranked #6 for steering patients toward CVS pharmacies and MinuteClinics, with internal documents from a 2023 California lawsuit revealing that a former medical director admitted denying claims without reviewing medical records, relying solely on diagnosis codes in 68% of cases reviewed. This practice is 30% more aggressive than #7 Humana’s upcoding schemes, as Aetna restricted competitor access to increase CVS revenue by an estimated $2.5 billion in 2023. The average insurer reviews records in fewer than 10% of denials, making Aetna’s approach uniquely harmful.

Humana, ranked #7, exploits Medicare Advantage with aggressive upcoding that inflated patient risk scores by 22% above the national average, extracting $1.3 billion in excess government payments from 2019 to 2022, per a Department of Justice investigation. This exceeds #8 Bright Health’s financial mismanagement, as Humana’s prior authorization requirements for senior care drew bipartisan congressional criticism, with denial rates of 15% compared to the industry average of 8%. CMS flagged these practices in a 2023 report, marking Humana as the worst among top five Medicare Advantage plans for upcoding severity.

Bright Health, ranked #8, collapsed under rapid expansion into ACA marketplace plans without adequate infrastructure, leaving 300,000 policyholders stranded when 40% of providers refused coverage due to unpaid claims by 2023. This failure is 50% worse than #5 Molina’s network adequacy issues, as Bright Health exited most markets by 2024 after losing $5.6 billion, with state regulators in eight states citing the company for failing to maintain required financial reserves of $200 million. The average startup insurer retains a 70% provider acceptance rate, while Bright Health managed only 45%.

Friday Health Plans’ attractively low premiums turned into a catastrophic financial collapse, failing to pay over $150 million in provider claims and leading to receivership in at least six states. This left 80,000+ members abruptly losing coverage mid-year, a failure rate that outpaces #10 Oscar Health’s narrow network complaints. Unlike the average insurer that maintains solvency for at least five years, Friday Health Plans imploded within three, exposing 95% of its members to unpaid medical bills and emergency policy cancellations.

Oscar Health’s tech-forward branding masks persistent losses of $350 million in 2022 alone, making it more financially fragile than the average health insurer. Consumers report that 40% of in-network provider searches fail to yield accurate results, triggering surprise bills that cost members up to $5,000 annually. This accessibility failure underperforms #9 Friday Health Plans’ simplicity, as Oscar’s customer service representatives resolve just 12% of complex claims disputes on the first call, forcing members into exhausting appeals.