N.Y. Pub. Health Law § 238-B
Each request for payment or bill submitted by a health care provider for clinical laboratory, pharmacy services, radiation therapy services, physical therapy services or x-ray or imaging services for which the provider knows or has reason to believe that there has been a referral by a referring practitioner who is an interested investor in the health care provider shall identify the referring practitioner by name and by professional license number or any appropriate program provider number. The provisions of this section shall not apply to requests for payment or bills the content of which are regulated solely by federal law or regulation and to services excluded pursuant to paragraph (a), (b), (c), (d) or (e) of subdivision two of section two hundred thirty-eight-a of this title from the prohibitions of subdivision one of section two hundred thirty-eight-a of this title.
N.Y. Pub. Health Law § 238-B