R.I. Gen. Laws § 27-20.8-4: Price disclosure.

A plan sponsor, health insurance carrier, or pharmacy benefits manager shall not prohibit a pharmacist from providing an insured information regarding the amount of the insured’s cost share for a prescription drug. Neither a pharmacy nor a pharmacist shall be penalized by a pharmacy benefits manager for discussing any information described in this section or for selling a lower-priced drug to the insured if one is available.