GFR is one of the most important kidney lab values to know for NP boards because it tells you how well the kidneys are functioning and helps determine chronic kidney disease staging. In this minisode, I break down the key GFR cutoffs, explain how to think of CKD stages as a simple ladder, and review the clinical decisions that often show up on exams, including medication adjustments, kidney protection strategies, and when dialysis becomes necessary.

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