Code of Federal Regulations Title 42. Public Health § 42.1004.10 Statutory obligations of practitioners and other persons

(a) Provided economically and only when, and to the extent, medically necessary;

(b) Of a quality that meets professionally recognized standards of health care;  and

(c) Supported by evidence of medical necessity and quality in the form and fashion and at such time that the reviewing QIO may reasonably require (including copies of the necessary documentation and evidence of compliance with pre-admission or pre-procedure review requirements) to ensure that the practitioner or other person is meeting the obligations imposed by section 1156(a) of the Act.