R.I. Gen. Laws § 27-19-17
Notwithstanding the provisions of this chapter, any nonprofit hospital service corporation organized under this chapter may contract with any of its subscribers for coverage or benefits for medical services as may from time to time be provided under any plan adopted by the corporation. "Subscribers" as used in this chapter includes, in addition to those set forth in § 27-19-1, persons contracting with the corporation for coverage or benefits for medical services. "Medical services" as used in this chapter means professional services rendered by physicians, dentists, podiatrists, or other providers of health services for any medical, dental, surgical, and other health services as may lawfully be rendered by them to subscribers; the term includes appliances, drugs, medicines, supplies, and nursing care necessary in connection with those services, or the expense indemnity for those services, appliances, drugs, medicines, supplies, and care, as may be specified in any nonprofit medical service plan.
R.I. Gen. Laws § 27-19-17