Do insurance companies have a right to accept or reject you for insurance coverage based on the results of voluntary and confidential genetic testing predicting your future health?

No, insurers are not allowed to discriminate against people who have had genetic testing. The Genetic Information Nondiscrimination Act of 2008 specifically prohibits health insurers from using genetic test results to charge people different rates or to refuse to cover them. The law protects people from discrimination by health insurers and employers on the basis of DNA information.