R.I. Gen. Laws § 5-30-16: Fee splitting.

No chiropractic physician may directly or indirectly receive payment, reimbursement, compensation, or fee for a referral to any clinical laboratory. A violation of the provisions of this section constitutes a misdemeanor and upon conviction may be punished by imprisonment for not longer than one year or a fine of not more than five hundred dollars ($500), or by both fine and imprisonment.