; (ii) maintains a physical facility on an appropriate site; (iii) has proof of appropriate liability insurance; and (iv) meets such other requirements as the Secretary shall specify. (C) Prohibition against multiple supplier numbers The Secretary may not issue more than one supplier number to any orthotic or prosthetic supplier unless the Secretary finds that the issuance of more than one number is appropriate to identify other entities under the ownership or control of the orthotic or prosthetic supplier. (2) Order for orthotics or prosthetics (A) Information provided by orthotists and prosthetists on detailed written orders for orthotics and prosthetics An orthotist or prosthetist may distribute to physicians, physician assistants, nurse practitioners, clinical nurse specialists, or individuals entitled to benefits under this part, a detailed written order for orthotics or prosthetics (as defined in paragraph (5)) for commercial purposes that contains the following information: (i) The identification of— (I) the orthotic or prosthetic supplier