The Court determined that NRS 616B.578(4) does not require an employer to know the precise medical terminology for an employee’s permanent physical impairment before the subsequent injury. However, the statute requires that an employee’s preexisting permanent physical impairment be fairly and reasonably observed from a written record and the impairment must amount to at least 6% whole person impairment.
Nelson, Hannah, "N. Lake Tahoe Protection Dist. v. Bd. of Admin., 134 Nev. Adv. Op. 93 (Dec. 6, 2018) (en banc)" (2018). Nevada Supreme Court Summaries. 1213.