Dear Senator,
As your constituent, I am writing to urge you to cosponsor the Patients' Privacy Protection Act, new legislation that will soon be introduced by Rep. Jerry Nadler and Sen. Hillary Rodham Clinton.
[Your comments]
The Patients' Privacy Protection Act would ensure that the federal government respects medical privacy by guaranteeing the confidentiality of doctor-patient privilege under federal law. I value my right to privacy, and ask that you cosponsor this bill to protect your constituents.
Sincerely,
[Your name]