There is no federal law requiring employers to provide you with health insurance. Many workers go uninsured, though numerous employers voluntarily provide insurance as a means of attracting and keeping good employees. Hawaii is the only state that requires employers to provide health insurance.
Some states require that employers who do provide insurance provide some type of minimum coverage.
Your state's health commission will know whether your state mandates any minimum coverage. Usually the employer deducts money for the premiums from employees' paychecks. There are two main types of insurance plans. Under a reimbursement plan, the employer reimburses a hospital or doctor for medical services. This type of plan allows employees to choose their own medical providers.