Top 10 biggest health insurance companies

Private health insurance specialists are a critical part of healthcare coverage in the United States, but other major players influence the market as well.

Life/annuity and property/casualty insurers also write health insurance premiums, with the top 10 largest insurers collectively writing 51.8% of all premiums in the U.S. market in 2018. That’s according to the National Association of Insurance Commissioners (NAIC). Since 2009, the industry’s direct written premiums have risen 57.3%, up to $1.1 trillion in 2018.

Here are the 10 biggest health insurance and accident groups in the U.S., according to Insurance Business America:

  1. UnitedHealth. With 14.2% market share and direct written premiums of $156.9 billion in 2018, UnitedHealth is the biggest in the industry. It also owns the nation’s largest health insurance plan, UnitedHealthcare.
  2. Kaiser Foundation. A California-based non-profit, Kaiser offers a suite of healthcare services and has a market share of 8.5% The company’s direct written premiums in 2018 reached $93.2 billion.
  3. Anthem. The health benefits company, which has HMOs, PPOs and dental networks and other health plans, has a market share of 6.1% and direct written premiums of $67.2 billion in 2018.
  4. Humana. The Louisville-based healthcare services company has a 5.1% market share and $56 billion in direct written premiums in 2018. The company has focus on increasing its integrated care strategy.
  5. CVS. Through health services, plans and community pharmacists, CVS has worked on a new approach to total health and taken 5% of market share. The company had direct written premiums of $55.4 billion in 2018.
  6. HCSC. Health Care Service Corporation is the largest customer-owned healthcare insurance company in the nation, with a market share of 3.4%. It had $36.9 billion in direct written premiums in 2018.
  7. Centene Corp. This multinational healthcare company and Fortune 500 business had direct written premiums if $36.3 billion in 2018 and 3.3% market share.
  8. Cigna Health. With a 2.7% market share and $29.3 billion in direct written premiums in 2018, Cigna is a top 10 group. The company offers insurance plans spanning Medicare, Medicare supplemental plans, international health insurance, individual plans.
  9. WellCare Health Plans. The managed care provider snapped up the Medicare Part D business from Aetna as part of the insurers $69 billion merger with CVS Health in late 2018. WellCare had a market share of 1.9% in 2018 and direct written premiums totaling $20.5 billion.
  10. Molina Healthcare. With a market share of 1.7% and $18.5 billion in direct written premiums, Molina is a Fortune 500 company that exclusively offers government-sponsored healthcare programs.