What are the top 3 health insurances in the USA?

The top 3 health insurance companies in the United States by market share, enrollment, and direct written premiums are UnitedHealth Group (UnitedHealthcare), Elevance Health (formerly Anthem), and CVS Health (owner of Aetna).

The Top 3 Health Insurers

1. UnitedHealth Group (UnitedHealthcare)

• Market Share: Largest in the U.S., controlling over 16% of the national market.
• Enrollment: Serves roughly 44.8 million medical plan members.
• Key Details: Offers commercial plans, Medicare, and Medicaid options alongside its Optum health services and delivery arm.

2. Elevance Health

• Market Share: Second or third largest, holding about 6.4% to 7% of the market.
• Enrollment: Covers approximately 36.1 million members.
• Key Details: Operates Blue Cross Blue Shield plans in 14 states and provides extensive individual, employer, and government-sponsored coverage.

3. CVS Health (Aetna)

• Market Share: A leading national carrier with roughly 6.4% to 7.2% of the market share.
• Enrollment: Provides health benefits to over 24.9 million medical members.
• Key Details: Combines Aetna’s health insurance plans with CVS retail pharmacies, walk-in clinics, and the Caremark pharmacy benefit manager.

The top-rated health insurance companies in the U.S. for customer satisfaction, plan quality, and value are Kaiser Permanente, Humana, Horizon BCBSNJ, Blue Cross Blue Shield of Michigan, and Highmark.

Top 5 Best Health Insurance Companies (Quality & Satisfaction)

• Kaiser Permanente: Ranked #1 overall nationally for multiple consecutive years. It is praised for high customer satisfaction and integrated care, though it is only available in select states.
• Humana: Highly rated for customizable coverage, low deductibles, and strong performance in Medicare and individual plans.
• Horizon BCBS of New Jersey: Known for excellent policy offerings and high member recommendation scores.
• Blue Cross Blue Shield of Michigan (Blue Care Network): Offers reliable regional coverage with high marks for care quality.
• Highmark: Provides robust provider networks and stable financial performance across multiple states.

(Note: While companies like UnitedHealth Group and Aetna are the largest by enrollment and market size, regional and integrated providers often score higher in direct customer satisfaction surveys.)

UnitedHealth Group is the #1 health insurance company in America by size, market share, and enrollment.

Largest Insurers by Size

• UnitedHealth Group (UnitedHealthcare): The largest overall provider in the U.S., controlling over 16% of the market with tens of millions of enrolled members.
• Elevance Health (formerly Anthem): The second-largest health insurer by enrollment, managing major Blue Cross Blue Shield plans in multiple states.
• CVS Health (Aetna): A massive national carrier offering diverse employer, individual, and group coverage.

Top Rated for Customer Satisfaction

If "number one" means quality and member satisfaction rather than sheer size, Kaiser Permanente is frequently ranked as the #1 best overall health plan by publications like Insure.com and Investopedia for its high customer satisfaction, integrated care model, and affordability. Another major top-tier network with massive nationwide coverage is Blue Cross Blue Shield.

The top 5 largest health insurance companies in the United States by market share and enrollment are UnitedHealth Group, Elevance Health (formerly Anthem), [Centene Corporation, Humana], and [CVS Health (Aetna)].

Largest Health Insurers by Size and Market Share

• UnitedHealth Group (UnitedHealthcare): The largest health insurer in the United States, serving tens of millions of members with a massive nationwide network of doctors and healthcare delivery through its Optum arm.
• Elevance Health: Operates Blue Cross Blue Shield plans in multiple states and serves millions of members with extensive commercial and individual plan offerings.
• Centene Corporation: Focuses heavily on government-sponsored healthcare programs, including Medicaid, Medicare, and the ACA Marketplace (Ambetter).
• Humana: A major national player well-known for its large footprint in Medicare Advantage plans and strong customer service ratings.
• CVS Health (Aetna): Combines traditional health coverage with retail clinic access through CVS Pharmacy and MinuteClinic locations.

Top-Rated Insurers by Customer Satisfaction

If you measure the "top" companies by customer satisfaction and quality ratings rather than sheer size, consumer guides like Insure.com and Forbes Advisor rank providers differently:

• Kaiser Permanente: Consistently ranked highest for overall customer satisfaction, preventive care, and affordability, though it operates as an integrated HMO system in specific regions.
• Blue Cross Blue Shield (BCBS): Praised broadly for having some of the best nationwide provider networks via its independent regional licensees.
• Aetna / Humana: Frequently score well for low complaint ratios and accessible consumer perks.

Neither UnitedHealthcare nor Blue Cross Blue Shield is universally better; the right choice depends on your local doctors, specific medical needs, and whether you prefer digital tools or regional network strength.

Key Differences

• Network and Availability: UnitedHealthcare is the largest provider nationwide and has a massive footprint, particularly dominating Medicare Advantage plans (often paired with AARP). Blue Cross Blue Shield operates as a network of independent regional companies covering all 50 states, often providing deeper local hospital and physician connections.
• Cost and Pricing: Premiums and out-of-pocket costs vary dramatically by your specific state and zip code. In some markets, UnitedHealthcare offers lower baseline pricing or zero-premium Medicare options, while regional Blue Cross plans may have different pricing structures and rate hikes annually.
• Customer Experience and Technology: UnitedHealthcare tends to score higher for its mobile apps and digital user experience, but both companies receive mixed customer satisfaction reviews regarding prior authorizations and claims wait times. Blue Cross users occasionally report billing confusion tied to regional subsidiary structures.