Mass. Gen. Laws ch. 112 § 12F
No health care provider, as defined in section 1 of chapter 111 or hospital shall be held liable for damages for failure to obtain consent of a parent, legal guardian, or other person having custody or control of a minor child, or of the spouse of a patient, to emergency examination and treatment, including blood transfusions, when delay in treatment will endanger the life, limb, or mental well-being of the patient, or for the prevention of HIV, or for the prevention of HIV for sexually active minors.
Any minor may give consent to his medical or dental care at the time such care is sought if (i) he is married, widowed, divorced; or (ii) he is the parent of a child, in which case he may also give consent to medical or dental care of the child; or (iii) he is a member of any of the armed forces; or (iv) she is pregnant or believes herself to be pregnant; or (v) he is living separate and apart from his parent or legal guardian, and is managing his own financial affairs; or (vi) he reasonably believes himself to be at risk of exposure due to sexual activity or to be at risk of exposure to, suffering from or to have come in contact with any disease defined as dangerous to the public health pursuant to section six of chapter one hundred and eleven; provided, however, that such minor may only consent to care which relates to the diagnosis or treatment of such disease, or prevention of HIV, or prevention of HIV if the minor is sexually active.
Consent shall not be granted under subparagraphs (ii) through (vi), inclusive, for abortion or sterilization.
Consent given under this section shall not be subject to later disaffirmance because of minority. The consent of the parent or legal guardian shall not be required to authorize such care and, notwithstanding any other provisions of law, such parent or legal guardian shall not be liable for the payment for any care rendered pursuant to this section unless such parent or legal guardian has expressly agreed to pay for such care.
No health care provider, as defined in section 1 of chapter 111, nor any hospital, clinic or infirmary shall be liable, civilly and criminally, for not obtaining the consent of the parent or legal guardian to render medical or dental care to a minor, if, at the time such care was rendered, such person or facility: (i) relied in good faith upon the representations of such minor that he is legally able to consent to such treatment under this section; or (ii) relied in good faith upon the representations of such minor that he is over eighteen years of age.
All information and records kept in connection with the medical or dental care of a minor who consents thereto in accordance with this section shall be confidential between the minor and the physician or dentist, and shall not be released except upon the written consent of the minor or a proper judicial order. When the physician or dentist attending a minor reasonably believes the condition of said minor to be so serious that his life or limb is endangered, the physician or dentist shall notify the parents, legal guardian or foster parents of said condition and shall inform the minor of said notification.
Mass. Gen. Laws ch. 112, § 12F