Health Insurance Portability and Accountability Act - HIPAA.

The Health Insurance Portability and Accountability Act (HIPAA) provides rights and protections for participants and beneficiaries in group health plans. HIPAA includes protections for coverage under group health plans that limit exclusions for pre-existing conditions; prohibit discrimination against employees and dependents based on their health status; and allow a special opportunity to enroll in a new plan to individuals in certain circumstances. HIPAA may also give you a right to purchase individual coverage if you have no group health plan coverage available, and have exhausted COBRA or other continuation coverage.

-- Excerpt courtesy the US Department of Labor

For more information, visit:
http://www.dol.gov/dol/topic/health-plans/portability.htm