N.Y. WKC Law § 13-J

§ 13-j. Medical or surgical treatment by insurance carriers and\nemployers. (1) An insurance carrier shall not participate in the\ntreatment of injured workers, except as provided in paragraph five of\nsubdivision (i) of section thirteen of this article and subdivision\nseven of section thirteen-a of this article and except, that it may\nemploy medical inspectors to examine compensation cases periodically,\nwhile under treatment, and report upon the adequacy of medical care, and\nother matters relative to the medical conduct of the case, a copy of\nwhich report shall be filed directly with the chair within ten days, and\nthat it may maintain rehabilitation bureaus operated by qualified\nphysicians if authorized by the chair in accordance with section\nthirteen-c of this article. (2) An employer may maintain a compensation\nmedical bureau at the place or places of employment, if such bureau is\nrequired because of the nature of the industrial hazards, or the\nfrequency of injuries to employees arising out of industry. Such bureau\nor bureaus shall be authorized and licensed pursuant to section\nthirteen-c, and their use by an injured employee shall be optional in\naccordance with the provisions of section thirteen-a.\n