GINA, the Genetic Information Nondiscrimination Act, offers protection to employees from discrimination based upon genetic information.
Title I: Genetic Nondiscrimination in Health Insurance
Title II: Prohibiting Employment Discrimination on the Basis of Genetic information
Title III: Miscellaneous Provisions
The article EEOC Spells Out Rules On Genetic Information is geared toward employers and rules implementing Title II. However, it is an informative article, and one worth reading if you are affected by genetic health issues.