http://www.nahu.org/consumer/GroupInsurance.htm
National Association of Health Underwriters
The majority of Americans have group health insurance through their employer or the employer of a family member. Many people don't realize that health insurance is issued differently for different types of employers, and that since insurance is regulated at the state level, health insurance requirements for different types of employers can vary significantly from state to state. This guide provides basic information about purchasing a group health insurance plan.