N.Y. Comp. Codes R. & Regs. tit. 18, § 505.19 – Standards for services rendered by physicians' assistants and specialists' assistants.

(a) Services rendered by a registered physician's assistant or registered specialist's assistant shall conform to requirements in articles 131B and 37, respectively, of the State Education and Public Health Laws and to applicable provisions in regulations of the New York State Department of Health.
(b) Services so provided shall be eligible for payment from medical assistance funds as follows:
1. (1) To the physician employing the registered physician's assistant or registered specialist's assistant. Such payments shall be reimbursable at fees established for physicians in Part 533 of this Title.
  1. (i) Maximum reimbursable fee allowances contained in Part 533 of this Title shall apply whether the service is provided directly by the physician alone, by his employed physician's assistant or specialist's assistant, or by the combined service of both the physician and his employed physician's assistant or specialist's assistant.
  2. (ii) No duplication or increase in charges shall be made by the physician for a listed service or procedure because of the use of or assistance provided by a physician's assistant or specialist's assistant in his employ.
  3. (iii) A physician's claim for payment shall include identification of those services or procedures for which fees have been established which have been rendered by his employed physician's assistant or specialist's assistant and also the name of the physician's assistant or specialist's assistant who rendered the care.
2. (2) To an employing hospital, as defined in article 28 of the Public Health Law, by inclusion of the cost of provision of those services in the inpatient and/or outpatient rate developed for the facility.