This can only be done with a power of attorney from the patient. The patient can give it by appointing someone as a trustee or representative.
You may always appoint a confidential adviser to assist you in obtaining the information about your health condition. If you wish, the confidant may review your patient record, or request a copy. The confidant may not make decisions regarding your illness and treatment on your behalf. A confidant can actually be anyone: a family member, a neighbor, a close friend, another doctor.
Form designation trustee
If you wish, you may also appoint a legal representative. Your representative, if you are no longer able to make decisions regarding your health (e.g., if you fall into a coma), will exercise the patient's rights on your behalf, and thus make decisions regarding your health and treatment. If you do not appoint a representative, and you are no longer able to exercise your rights, then in substitute order your spouse/partner, your adult children, your parents or your adult sibling will act as representative.
Form designation of representative