R.I. Gen. Laws § 27-20-14: Coverage for adoptive children.

Subscribers to any nonprofit medical service plan who have satisfied the continuous membership requirements of the plan and who adopt children under the guardianship and custody of the director of the department of children, youth and families shall be afforded coverage under the plan for the adopted child without any waiting period, notwithstanding the fact that the adopted child may have any preexisting medical condition.