http://www.intelihealth.com/
The US has a health care privacy act called HIPPA that they're very serious about.
EDIT: - also like their disclaimer -
InteliHealth and HMS subscribe to the privacy principles of an international group, Health Internet Ethics (Hi-Ethics), and have imposed additional privacy standards on their relationship. For example, the site will provide clear guidelines for how it will utilize user-supplied information. Moreover, users must give explicit permission before any personally identifiable information will be released to a third party. For further information, see our privacy policy.
InteliHealth maintains a policy of clearly separating advertising and editorial content. All employees of both InteliHealth and Harvard Medical School must adhere to strict conflict-of-interest policies.
Edited by dpyers