Yes, the visualization is misleading. The percentages of the categories (Orthopedic, Cardiac, Neuro, and General) should sum to 100% in a pie chart for accurate representation. In this case, they sum to 100% (25% + 30% + 20% + 25%), so there is no non-sum to 100% error based on the provided data values. Therefore, it seems there might be a mistake in labeling it as misleading for this reason.