
There are numerous medical insurance companies, and finding the one that best meets your needs can be challenging. Some of the largest health insurance companies in the United States include UnitedHealth Group, Blue Cross Blue Shield, Kaiser Permanente, Anthem, Humana, and Elevance Health. These companies offer a range of health insurance plans, including individual, family, and employer-based policies, as well as supplemental coverage for dental, vision, and mental health care. They vary in terms of provider networks, premiums, customer service, and other factors, so it's important to carefully consider your priorities when choosing a health insurance company.
| Characteristics | Values |
|---|---|
| Largest health insurance company by membership in 2021 | UnitedHealthCare |
| Largest health insurance company by membership in 2025 | Kaiser Permanente |
| Second-largest medical insurance provider by revenue | Anthem |
| Largest health insurance company by market share | Blue Cross Blue Shield |
| Largest Medicaid managed care provider | Centene |
| Largest for-profit managed healthcare company in the Blue Cross Blue Shield Association | Elevance Health |
| Provider with a large network of over 1.7 million in-network providers | Blue Cross Blue Shield |
| Provider with a strong network of over 1.5 million medical and healthcare specialists | UnitedHealth Group |
| Provider with the highest number of recommendations | Highmark |
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Kaiser Permanente
The Gold plan, with its higher monthly premium, lower deductible, and lower out-of-pocket costs, is geared towards individuals with dependents or those who use healthcare services regularly. Kaiser Permanente also assists members in understanding their healthcare costs, setting budgets, and finding ways to save money. They emphasize that their plans offer the same quality of care but differ in how costs are split.
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UnitedHealthcare
The company's website, UHCProvider.com, offers resources and tools for providers and healthcare professionals. It includes information on prior authorization, medical policies, pharmacy updates, and reimbursement protocols. The website also highlights the impact of cultural barriers on patient health outcomes and encourages the integration of traditional cultural practices in treatment plans.
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Blue Cross Blue Shield
However, the company's Health Maintenance Organization (HMO) networks in metropolitan areas are not as extensive as some other providers, and the prices of their marketplace PPOs are considered high. Blue Cross Blue Shield is part of Elevance Health, the biggest for-profit managed healthcare company in the Blue Cross Blue Shield Association. Elevance Health offers various health insurance plans, including medical, dental, and eye care, and these policies are available to employers, individuals, and their families.
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$71.18 $105.95

Humana
Some examples of medical insurance companies in the United States include Kaiser Permanente, Aetna, Oscar, Blue Cross Blue Shield, and Humana.
In recent years, Humana has made several strategic moves, including selling Concentra in 2015 and acquiring a stake in Kindred Healthcare in 2018. In 2022, Humana sold a majority interest in its Kindred at Home division to a private investment company. Additionally, Humana has been a sponsor of various cultural and sports events, such as the Grand Ole Opry, the National Senior Games, and the Humana Festival of New American Plays in Louisville, Kentucky.
In terms of public perception, Humana has had both positive and negative attention. In 1987, Humana sued NBC over a storyline in the television medical drama "St. Elsewhere," claiming trademark infringement. While Humana was unsuccessful in blocking the show, they did secure a disclaimer from NBC. In 1996, a physician contracted to work for Humana testified before Congress about the potential downsides of managed care, including the incentive structure that could prioritise cost-saving over patient well-being.
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$74.95 $74.95

Elevance Health
The company has been recognised for its innovation, featuring on the Fortune 100 Best Companies to Work For list for four consecutive years. Elevance Health has also been named one of America's Most Innovative Companies by Fortune, transforming industries through product, process, and culture initiatives. In addition, Elevance Health has demonstrated its commitment to health equity by addressing the digital divide, which can impact people's health and social needs.
Through its acquisitions, Elevance Health continues to expand its reach and enhance its offerings. In 2022, the company acquired Integra Managed Care in New York and Blue Cross and Blue Shield of Louisiana, increasing its footprint to 15 states and adding nearly 2 million new members.
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Frequently asked questions
Some examples of medical insurance companies in the US include UnitedHealthcare, Blue Cross Blue Shield, Kaiser Permanente, Humana, and Elevance.
UnitedHealthcare is the largest health insurance company in the US by membership for 2021. However, this can change by state and ranking variable.
Blue Cross Blue Shield is the largest health insurance company in most states by membership. It has a large provider network of over 1.7 million in-network providers, and its plans are accepted in all 50 states.
Some alternatives to Blue Cross Blue Shield include UnitedHealthcare, Kaiser Permanente, Elevance, and Humana.
Finding the best health insurance company for yourself depends on your unique needs and situation. Some factors to consider are the cost of premiums, the availability of the insurer in your state, the range of coverage, and the quality of customer service. Reading reviews and comparing the ratings of different insurers can help you make an informed decision.











































