Yes, the (federal) Health Insurance Portability and Accountability Act of
1996 deals with this issue and protects those in group health plans.

>Does anyone know if there is a federal genetic discrimination law that
>prevents employers and insurance companies from discriminating against
>individuals who participate in a genetic research study and are
>subsequently found to carry a gene that puts the individual at a higher
>risk of a serious disease?  If such a law exists, can you tell me where to
>find it?  Thanks.
>
>Barbara H. Gray                            Telephone:   803-953-5673
>Director of Sponsored Programs      Fax:            803-953-6577
>College of Charleston                     e-mail:         xxxxxx@cofc.edu
>Charleston, SC  29424                   Location:     407G Bell Building