Through an employer. This is the least expensive way to acquire insurance. If you work for a large company, it may pay some or all of your monthly premium.
Large businesses have the bargaining power to provide lower premiums and greater benefits.
You probably will not be required to pass a health exam, and your preexisting conditions may be covered. You're also more likely to have a choice of plans if you work for a large employer. Small businesses, on the other hand, are at a disadvantage in negotiating insurance coverage. They may have trouble even obtaining coverage based on the health history of one or more employees, and their premiums are likely to be more expensive. Some states have passed laws that require insurers to offer coverage to small groups within a set price range.