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.
Rehabilitation nursing; management & evaluation
Rehabilitation-nursing carryover across the stroke deficit set and management of the secondary-prevention and complication plan are skilled services under Chapter 8; skilled therapy is documented in the therapy record.
Observation & assessment of an unstable condition
The recovering stroke carries a reasonable potential for a recurrent stroke or a time-critical complication; detecting them requires daily nursing judgment.