Indiana Code Title 16. Health § 16-36-7-27

Sec. 27. (a) Except when an individual has been determined to be incapacitated under section 35 of this chapter, an individual may consent to the individual's own health care if the individual is:

(b) A person at least seventeen (17) years of age is eligible to donate blood in a voluntary and noncompensatory blood program without obtaining permission from a parent or guardian.

(c) A person who is sixteen (16) years of age is eligible to donate blood in a voluntary and noncompensatory blood program if the person has obtained written permission from the person's parent.

(d) An individual who has, could be expected to have exposure to, or has been exposed to a sexually transmitted infection is competent to give consent for medical or hospital care or treatment, including preventive treatment, of the individual.

(e) If:

the health care decisions by that individual take precedence over decisions made by a health care representative designated in that individual's advance directive.

(f) Nothing in this chapter prohibits or restricts a health care provider's right to follow or rely on a health care decision or the designation of a health care representative on a permanent or temporary basis that is:

(g) If:

the advance directive controls.