Top 25 Health Insurance Companies in the U.S.

Top 25 Health Insurance Companies in the U.S.

The largest 125 U.S. health insurers collected approximately $713 billion in premiums, with the top 25 accounting for nearly two-thirds of the total.

Top 25 U.S. Health Insurance Companies, By Market Share

  1. Unitedhealth Group
  2. Wellpoint Inc. Group
  3. Kaiser Foundation Group
  4. Humana Group
  5. Aetna Group
  6. HCSC Group
  7. Cigna Health Group
  8. Highmark Group
  9. Coventry Corp. Group
  10. HIP Insurance Group
  11. Independence Blue Cross Group
  12. Blue Cross Blue Shield of New Jersey Group
  13. Blue Cross Blue Shield of Michigan Group
  14. California Physicians’ Service
  15. Blue Cross Blue Shield of Florida Group
  16. Health Net of California, Inc.
  17. Centene Corp. Group
  18. Carefirst Inc. Group
  19. Wellcare Group
  20. Blue Cross Blue Shield of Massachusetts Group
  21. UHC of California
  22. Lifetime Healthcare Group
  23. Cambia Health Solutions Inc.
  24. Metropolitan Group
  25. Molina Healthcare Inc. Group

Insurance is a means of protection from financial loss. It is a form of risk management primarily used to hedge against the risk of a contingent, uncertain loss.

What is Insurance?

Insurance is a contractual agreement. You pay an amount of money in return for a promise from an insurance company to pay you for a loss you sustain. The policy is the contract and defines the coverage; its language will detail the conditions and circumstances under which the policy holder will be financially compensated..

Why do I need it?

Your resources may be insufficient to meet your needs if you suffer an accidental loss. Insurance can help to keep you financially stable by protecting your assets or income. There are three basic types of loss. One, you could lose your property or personal possessions through fire, water damage, or some other calamity. Two, you could accidentally hurt someone and be financially responsible or legally liable for his or her injuries or their property loss. Three, you could be injured or sick and need medical care, including hospitalization. There are different types of insurance to meet these needs.

What kind of insurance do I need?


Students in Massachusetts are required by law to carry some form of health insurance. Many students are insured by their parents’ employee health benefits, while others purchase the coverage made available through their college or university.  After you graduate, your parents’ health insurance can continue to cover you until you are 26 years of age, or you can purchase coverage through your employer.


Some students may be living in rental apartments, and most students will move into rental apartments upon graduating. Your landlord is not responsible for loss of or damage to your property (see your lease).  A tenants’ insurance policy will insure you against loss of your personal property, cover you for your negligent damage to the landlord’s property, and also provide general liability coverage for your negligent acts which result in the loss of property or injury to a third person. For example, your carpet is torn and someone hurts themselves tripping over it. Or your dog bites a stranger.

This type of coverage is not expensive (a few hundred dollars per year), and offers a good measure of protection. Buy the highest General Liability limits you can afford. Do not insure your personal property for more than it would cost to replace it, but do accurately report replacement values. Also look for a policy that covers your property while it is not at the premises listed on the policy.

Personal property typically includes all your clothing, furnishings, electronic equipment, and other personal items. It does NOT cover jewelry, musical instruments, art, money, securities, or other highly valued items (read your coverage for exclusions and definitions). These types of property are insured under a “floater” policy. You should speak to your insurance agent if you have property that is excluded under the tenant’s policy. Insurance on computers is often not worthwhile, since the insurance will only pay for the replacement of equipment of like kind and quality. Since computer values drop quickly and steadily, the insurance is often expensive for what you might recover.

If you own real property or a business, consult with your insurance agent about the coverage you may need.


Most states require Auto insurance by law. Whether it is required by law or not, it is essential if you own an auto. Auto insurance has three areas of coverage – Liability, Comprehensive, and Collision. Liability Insurance covers you for any injury you may cause to others, for example, hitting a pedestrian or another vehicle. It is the most important auto insurance, and you should buy the highest limits you can afford, at least $100,000 per person, $300,000 per accident. $1,000,000 is recommended.

Comprehensive Coverage pays for losses to your vehicle arising from such hazards as fire, natural disaster, and vandalism and may cover hitting an animal (such as a deer). Collision pays for losses to your auto arising from collision with another object, vehicle, and in some states, an animal (such as a deer). If your car worth is less than $5,000, collision insurance may not be cost effective, since the company will not pay more than the actual value of the vehicle. Comprehensive and glass coverage is usually a cost effective coverage, unless the car has no value. Talk with your agent about your options.

Check your policy to verify whether or not your auto insurance “follows” the vehicle, so that if a friend borrows your car with your permission, he/she is insured by your insurance. Also note that most insurers require that persons living in your household (including relatives) who may drive the vehicle must be listed on the policy in order to be insured. 

Other Resources and Types of Coverage


If you serve as a volunteer in an organization, you should make sure that the organization carries general liability insurance, and that volunteers are included in the “who is an insured” wording on the policy. If you are on the board of directors of any organization, ask for a summary of their Directors and Officers Insurance policy. You want to know that if you are personally sued for actions you take on behalf of the organization, that you will be indemnified and defended.


If you are employed, you will probably be automatically covered by workers compensation. It is mandated in every state, and benefits vary significantly by state. It provides coverage for any injury you may sustain in the course of your employment, not only for medical costs, but for a portion of your wages as well.  Check with your employer about coverage.


Your employer may carry short and long term disability insurance for all employees. These policies cover your loss of wages if you are disabled for more than one month, or six months, respectively. If one or both are optional, do seriously consider purchasing coverage. Statistics show that one person in ten will be disabled from their work for more than six months in their lifetime.


Life insurance will pay a monetary benefit to a survivor (also known as a beneficiary) in the event of your passing. Speak with your financial advisor about appropriate coverage based on your marital status, dependents, financial planning, and portfolio.


Documentation is essential in filing a claim, whether it is to your own insurance carrier or if you are making a claim against a third party. Keep copies of all medical bills, invoices for purchase of replacements of damaged or lost property, estimates, and so forth. Check with your insurance agent if you have a loss – don’t assume that it isn’t covered. You may be pleasantly surprised. Set up a file on your claim, and keep copies of all correspondence, notes of who you spoke with and when, their phone number, and so forth.

If you have a small, straightforward claim against a third party, send a letter to the party responsible for the loss. Clearly describe what happened, what your losses were (use the words “bodily injury”, “personal injury” or “property loss or damage” as applicable), and why you think they are responsible. In general, there has to be negligence on the part of the third party in order for them to be legally responsible for your loss, and it will help your claim if you can articulate in the letter how they were negligent. This specific wording will trigger the respondent’s general liability policy (or other policies), and may help you obtain a quick settlement without your having to involve an attorney.

This is intended to be a brief summary of typical insurance coverages. It is not a comprehensive description of all coverages available, or to be construed as legal advice. Always check with your insurance agent for specific insurance information and with your attorney for legal advice.

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