Fig. 3.  Nomogram for predicting 30-day major morbidity based on Current Procedural Terminology (CPT) code, American Society of Anesthesiologists (ASA) Physical Status, and hospitalization. Instructions:  Find the Procedural Severity Score for morbidity (PSS morbidity) in Supplemental Digital Content 1 for the patient's primary CPT code. Locate this score on the axis labeled “PSS-Morbidity” by interpolating between the displayed values, and draw a vertical line to the “Points” axis to find the points toward 30-day morbidity associated with the patient's procedure. Repeat this process for ASA Physical Status and hospitalization and add the three resulting point values to obtain the patient's total points. Locate this number on the “Total Points” axis (shaded region ) and draw a vertical line to the axis labeled “Predicted Probability of 30-Day Major Morbidity or Mortality (%).” This value represents the prediction for the patient.