N.Y. Comp. Codes R. & Regs. tit. 18, § 505.1
(1) Medical care, services and supplies available to eligible persons must, except to the extent that such medical care, services and supplies are certified as inappropriate, unnecessary or otherwise not authorized by the Commissioner of Health or his or her designee and except as provided in subdivision (b) of this section, include the following:
(2) Medical care, services and supplies available to a recipient, who is eligible for medical assistance (MA) solely as a result of being eligible for or in receipt of home relief (HR) and who is at least 21 years of age but under the age of 65, except to the extent that such medical care, services and supplies are certified as inappropriate, unnecessary or otherwise not authorized by the Commissioner of Health or his or her designee, include the following only if such recipient is enrolled in a health maintenance organization or other entity which provides comprehensive health services, a managed care program or other primary provider program as specified by the department, or a voluntary medical care coordinator program (MCCP):
(xi) nursing home in-patient care unless the recipient was an in-patient nursing home resident on July 1, 1992.
(b) Authorization for medical services and supplies.
The identification card issued to a person eligible for medical assistance shall constitute full authorization for providing any medical services and supplies for which the person is eligible under title 11 of article 5 of the Social Services Law except when:
(1) medical services and supplies, in accordance with the regulations of the department, routinely require:
(2) the identification card on its face:
(a) Services available.