Can a POA Prevent Other Family Members from Getting Medical Information on a Loved One?

From what you say, your boyfriend’s sister does have this right. Under health care privacy laws, health care providers may not provide information to anyone without a release from her or her agent under a health care durable power of attorney or proxy. The agent can also sign a release, but without going to court I’m not sure what you could do to force the sister to authorize the release of health care information. For more information on federal privacy laws, go here: http://www.elderlawanswers.com/use-this-form-to-avoid-loved-ones-being-denied-medical-information-about-you--15184.