Nevada Revised Statutes
Chapter 41A - Actions for Professional Negligence
NRS 41A.015 - "Professional negligence" defined.

"Professional negligence" means the failure of a provider of health care, in rendering services, to use the reasonable care, skill or knowledge ordinarily used under similar circumstances by similarly trained and experienced providers of health care.
(Added to NRS by 2004 initiative petition, Ballot Question No. 3; A 2015, 2526)