1 On September 5, 2013, CMS released guidance that discussed the provisions of the final rule regarding the physician order and physician certification of hospital inpatient services. 2  This document includes further clarification of issues addressed in the previous guidance.
Full Answer. Also called a dichotomous key, a taxonomic key gives users a systematic and reproducible way to identify items and organisms. It is used for a variety of purposes, such as identifying unknown organisms to a certain taxonomic level (e.g. family, genus and species) and identifying rocks or minerals.
Keying is a specific way to facilitate the identification process for a particular group of organisms in a particular region (for which the key was prepared). Typically, such a key is a dichotomous hierarchy of decisions about whether the individual has or doesn't have particular features.