Top 10 health insurance companies in the US

The 10 largest health insurance companies in the US control nearly 57% of the market, underwriting $821.5 billion worth of premiums in the past year. These figures are from the latest market share data from the National Association of Insurance Commissioners (NAIC).

In this article, Insurance Business takes a closer look at these industry giants. We will delve into the facts behind the numbers and give you an idea of what these companies offer.

If you want to learn more about the nation’s leading health insurers, you’ve come to the right place. Get to know the top 10 health insurance companies in the country in this guide.

The country’s accident and health insurance industry wrote more than $1.44 trillion worth of premiums in the past year, up by a whopping 112% from $680 billion in 2011. This indicates a robust health insurance space that caters to the medical and healthcare needs of the US population.

Here are the top 10 health insurance companies in the country based on NAIC’s latest industry report. The list is arranged by direct written premiums (DWP).

1. UnitedHealth Group

Head office: Minnetonka, Minnesota
DWP: $221.4 billion
Market share: 15.4%

UnitedHealth Group boasts a strong network of over 1.5 million medical and healthcare specialists and 6,200 hospitals. These professionals provide medical and dental benefits to the insurer’s more than 49 million members across the country. Here’s a breakdown of the group’s membership.

UnitedHealth policies are available nationwide. The health insurance giant delivers benefits and service through its two business units. These are:

1. UnitedHealthcare

UnitedHealthcare is the company’s health insurance unit offering members a range of healthcare services and coverage. These include:

  • UnitedHealthcare Medical Products: A suite of affordable health insurance products provided through its large network of medical professionals and hospitals.
  • UnitedHealth Wellness: The insurer’s selection of wellness programs and services.
  • Oxford Health: A range of affordable healthcare products for members in Connecticut, New Jersey, and New York.
  • Online Services: Easy-to-use online tools accessible through the website.
  • Virtual Visits: Allow members to access healthcare services using their mobile devices.
  • Business Travel Insurance: A selection of travel, medical, and personal assistance services available to mobile employees and their dependents.

2. Optum

Optum is the health insurance giant’s technology arm offering information and tech-enabled services through three platforms:

  • Optum Health: Delivers healthcare and medical services to over 102 million members.
  • Optum Insight: Provides research, analytics, and consulting services to medical professionals, governments, and life sciences firms.
  • Optum Rx: Gives members access to affordable pharmaceutical products and services.

2. Elevance Health

Head office: Indianapolis, Indiana
DWP: $103.4 billion
Market share: 7.2%

Previously known as Anthem, Elevance Health rebranded in June 2022. The insurer draws on its network of 1.7 million doctors and medical facilities to serve its more than 47.5 million members. This figure includes 21 million risk-based patients.

Apart from being among the largest health insurance companies in the US, Elevance Health is the biggest for-profit managed healthcare company in the Blue Cross Blue Shield Association.

The industry giant offers various health insurance plans covering medical, dental and eye care. These policies are available to employers and individuals, as well as their family members, through the group’s Anthem Blue Cross Blue Shield and Wellpoint brands.

Elevance Health also provides members with a range of healthcare services through its Carelon brand and other subsidiaries. The company’s policies are available in 14 states.

Health insurance companies – Elevance Health, list of states available

3. Centene

Headquarters: St. Louis, Missouri
DWP: $96.4 billion
Market share: 6.7%

Centene provides various services to government-funded healthcare programs for uninsured and underinsured Americans, including Medicare and Medicaid. The insurer is the country’s largest Medicaid managed care provider, with more than 28 million members across all 50 states. 

Centene offers local health plans and health insurance products. The company partners with other healthcare and commercial groups to provide members with specialty services. These include:

  • Behavioral health
  • Dental benefits
  • Care management software
  • Correctional healthcare services
  • In-home health services
  • Life and health coverage
  • Managed vision care
  • Pharmacy benefits management
  • Specialty pharmacy
  • Telehealth services

Centene is backed by 67,800 employees nationwide.

4. Kaiser Permanente

Head office: San Francisco, California
DWP: $89.2 billion
Market share: 6.2%

Kaiser Permanente is one of the largest non-profit healthcare organizations in the country. The insurer serves 12.7 million members. Its health plans are available in California, Colorado, Georgia, Hawaii, Maryland, Oregon, Virginia, Washington, and the District of Columbia.

Kaiser Permanente provides budget-based plans that cover the following:

These services are delivered through Kaiser’s vast network consisting of:

  • 23,982 physicians
  • 68,218 nurses
  • 39 hospitals
  • 622 medical offices

The health insurer’s plans come with low premiums and zero deductibles. Around 212,970 employees handle the company’s operations.

5. Humana

Head office: Louisville, Kentucky
DWP: $87.0 billion
Market share: 6.0%

Humana is among the largest managed care companies in the country, with more than 17 million members across all 50 states. The health insurer offers individuals, employer groups, and anyone searching for government-sponsored plans affordable options. These include: 

Members can access Humana’s products and services through three platforms:

  • Health Services: Offers wellness and healthcare products and services to individuals, employers, and Humana subsidiaries.
  • Group & Specialty: Provides commercial medical plans and specialty healthcare benefits to individuals and groups.
  • Retail: Consists of individual plans, including Medicare and Medicaid.

Humana’s workforce comprises about 67,100 employees.

6. CVS Health

Head office: Woonsocket, Rhode Island
DWP: $83.9 billion
Market share: 5.8%

CVS Health is a diversified healthcare benefits provider and one of the largest health insurance companies in the nation. It serves more than 23 million members in all 50 states.

CVS Health has more than 9,900 retail locations and nearly 1,100 walk-in clinics across the US. It also operates a pharmacy benefits manager with about 100 million plan members, as well as a senior pharmacy care business that serves over one million patients every year.

The health insurance giant’s policies provide standard benefits. Members can also access specialty pharmacy services and standalone Medicare Part D prescription drug plans.


Head office: Chicago, Illinois
DWP: $51.0 billion
Market share: 3.5%

Health Care Service Corporation, more popularly known as HCSC, operates as a mutual legal reserve firm. It is also the largest customer-owned health insurance company in the country, with about 18.6 million members. The insurer offers life and health insurance policies and related services through its subsidiaries, including:

  • HCSC Insurance Service Company
  • TriWest Healthcare Alliance
  • Prime Therapeutics
  • Medecision
  • Availity
  • Dearborn Group
  • Dental Network of America

HCSC holds membership with the Blue Cross Blue Shield Association, one of the most popular health insurance brands in the US. The insurer’s policies are available in Texas, Oklahoma, New Mexico, Montana, and Illinois. HCSC employs more than 22,000 staff.

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