What are some of the worst health insurance companies?

📊 Lowest-Rated Health Insurers

National consumer reports and industry data frequently rank certain health insurance providers near the bottom for customer satisfaction, complaint ratios, and claims processing.

• 🛑 Centene Corporation
  • Main Issue: Medicaid overbilling settlements
  • Details: Settled with over 20 state Medicaid programs for over $1 billion regarding pharmacy benefit manager overcharges.
• 🛑 UnitedHealthcare
  • Main Issue: Low physician reimbursement and claim delays
  • Details: Frequently cited by case managers and providers for difficult coordination, low payout rates, and high denial volumes.
• 🛑 Anthem / WellPoint
  • Main Issue: Policy cancellations for ill patients
  • Details: Penalized and fined historically for rescinding coverage on pregnant or chronically ill policyholders.
• 🛑 Molina Healthcare & Blue Shield of California
  • Main Issue: Below-average customer satisfaction rankings
  • Details: Tied for the lowest overall scores in major 2026 health insurance satisfaction evaluations.

🔎 How to Evaluate a Health Plan

Before enrolling, look past brand names to examine plan-specific metrics:

• NAIC Complaint Index: Measures valid state insurance department complaints relative to size.
• NCQA Ratings: National Committee for Quality Assurance evaluates clinical performance and patient experience on a 1-to-5 star scale.
• Network Breadth: Check whether your preferred local doctors and hospitals participate in-network.

National data and professional consensus indicate that large health insurers like UnitedHealthcare and Aetna frequently receive the highest volume of consumer and provider complaints regarding claim denials, sluggish reimbursements, and administrative difficulties.

Understanding Complaint Metrics

• Market Share vs. Raw Numbers: Large national carriers generate the highest absolute volume of complaints simply because they cover millions more members than regional providers.
• Complaint Ratios: Regulators look at the National Association of Insurance Commissioners (NAIC) complaint index, which adjusts complaints based on market share. An index above 1.0 means a company receives more complaints than average for its size.
• Common Grievances: Most consumer grievances involve delayed or denied prior authorizations, disputed out-of-network bills, and sluggish customer service response times.

Most users on Reddit agree that companies like UnitedHealthcare and Aetna are among the most challenging health insurance providers to navigate.

While "worst" lists vary depending on whether you look at auto, home, or health insurance, consumer advocacy groups and legal organizations (such as the American Association for Justice) frequently rank several major providers at the bottom due to high complaint volumes, claim delays, and aggressive "deny, delay, defend" tactics.

Five widely cited insurance companies frequently appearing on lists of the worst to deal with include:

• Allstate: Frequently tops industry lists for utilizing lowball settlement offers, using proprietary software (like Colossus) to undervalue injury claims, and encouraging an adversarial relationship with policyholders.
• State Farm: As the largest property and casualty insurer, it faces frequent criticism and lawsuits for high claim denial rates on homeowners policies, slow payout strategies, and aggressive policy non-renewals.
• Liberty Mutual: Commonly cited by personal injury attorneys and consumer watchdogs for low auto claim settlements, delayed adjuster responses, and steep, sudden rate hikes.
• Unum: Widely known as a major disability insurer with a long-standing reputation for unfairly delaying, disputing, and denying legitimate long-term disability claims.
• Farmers Insurance: Frequently flagged in consumer satisfaction and J.D. Power surveys for subpar collision repair experiences, low payout settlements, and frustrating claims processes.

You should review consumer complaint data and legal evaluations before picking an insurer, as large companies like Allstate, State Farm, and Liberty Mutual frequently rank poorly for delaying or undervaluing claims.

Major Insurers Frequently Criticized for Claims Practices

• Allstate: Legal and consumer groups often cite this company for low initial settlement offers, strict litigation tactics, and high complaint volumes.
• State Farm: Policyholders frequently report long wait times, poor communication, and disputes over how storm or property damage is classified.
• Liberty Mutual: Personal injury attorneys and consumer reports often flag this company for low payout offers and difficulties during the auto claims adjustment process.
• Progressive: This carrier faces regular criticism for undervaluing vehicle repair estimates and pushing back heavily on injury claims.

Budget and High-Risk "Last Resort" Companies

• Minimum-Coverage Specialists: Smaller budget companies (such as Fred Loya or Country-Wide) focus on high-risk drivers. They often sell bare-minimum policies that leave you exposed, and they have reputations for poor customer service and slow response times.
• Guaranteed Acceptance Ads: Any company that advertises zero turn-downs or guaranteed coverage usually provides limited dollar limits and high out-of-pocket costs when an accident happens.

You can read a detailed breakdown of bad-faith tactics in the Colorado Law Worst Insurers Guide.

Oscar Health denied 25.3% of in-network claims in 2024, representing the highest denial rate among major national ACA marketplace health insurers.

Health Insurance Denial Rates

• Oscar Health: Denied 25.3% of marketplace claims.
• Molina Healthcare: Denied 22% of claims.
• Ambetter (Celtic): Denied 21% of claims.
• UnitedHealthcare: Denied 20% of claims (down from 33% the previous year).
• Kaiser Permanente: Recorded the lowest national rate at approximately 6%.

Homeowners and Auto Insurance Denial Rates

• Allstate and USAA: Frequently flagged by public reports and consumer data for closing roughly 40% to 50% of property and homeowners claims without payment in high-risk regions.
• State Farm: Reported home insurance denial rates exceeding 41% to 59% in catastrophe-heavy markets like Florida.