Nevada Revised Statutes Title 57. Insurance § 695G.055. “Medically necessary”  defined

1. Provided in accordance with generally accepted standards of medical practice;

2. Clinically appropriate with regard to type, frequency, extent, location and duration;

3. Not primarily provided for the convenience of the patient, physician or other provider of health care;

4. Required to improve a specific health condition of an insured or to preserve the existing state of health of the insured;  and

5. The most clinically appropriate level of health care that may be safely provided to the insured.