; or (B) subject to section 1879, furnishes an orthosis or prosthesis to an individual for which payment is denied under section 1862(a)(1), any expenses incurred for the orthosis or prosthesis furnished to an individual by the orthotist or prosthetist not on an assigned basis shall be the responsibility of such orthotist or prosthetist. The individual shall have no financial responsibility for such expenses and the orthotist or prosthetist shall refund on a timely basis to the individual (and shall be liable to the individual for) any amounts collected from the individual for such items and services. The provisions of subsection (a)(18) shall apply to refunds required under the previous sentence in the same manner as such provisions apply to refunds under such subsection. (4) Individual liability If an orthotist or prosthetist furnishes an orthosis or prosthesis to an individual for which payment is denied in advance under subsection (a)(15), expenses incurred for such orthosis or prosthesis furnished to the individual by the orthotist or prosthetist shall be the responsibility of the individual. (5) Definitions In this subsection: (A) Detailed written order for orthotics or prosthetics (i) In general The term detailed written order for orthotics or prosthetics means a form or other document prepared by an orthotist or prosthetist and signed by the physician (as defined by section 1861(r)) that contains information required by the Secretary to be submitted to show that an orthosis or prosthesis is reasonable and necessary for the treatment of an illness or injury or to improve the functioning of a malformed body member. (ii) Clarification The detailed written work order for orthotics or prosthetic shall not be considered alone for purposes of determining the reasonableness, medical necessity, and functional level (applicable to prosthetics) of prosthetic devices and orthotics. (B) Orthotics and prosthetics The term orthotics and prosthetics has the meaning given that term in section 1834(h)(4)(C). (C) Orthotist