Map which Chapter 8 bases apply, then show the need is daily and can be met only in a SNF (the practical-matter test). This is what a coverage reviewer looks for on a Part A day.
Management & evaluation of the plan; observation & assessment
Section GG capture itself is a coding observation; the skilled element is assessing a functional change and managing the functional plan — recognizing decline, identifying the cause, and coordinating the response.
Rehabilitation nursing
Where a restorative program supports function, the RN design/evaluation is skilled (route to the Restorative reference).