OASIS

What the assessment is for, the timepoints and their deadlines, and the scoring conventions that cause most errors.

Which assessment is due when, who may complete it, the M0090 date that trips people up, and what to do when you miss a window.

The handful of rules that decide most OASIS answers — and the instincts that get in their way.

The six-point scale, what usual performance means, the activity-not-attempted codes, and why GG and the M items give different answers for the same patient.

The decision list for what counts as a surgical wound on OASIS, the items people most often get backwards, and when a surgical wound becomes a scar.

The drug regimen review series, what counts as a clinically significant issue, and scoring cognition on the day rather than from the diagnosis.

The specific contradictions reviewers find first, and a five-minute self-check that catches nearly all of them before you submit.