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ASA Physical Status Classification System
 
 
P1 A normal healthy patient
   
P2 A patient with mild systemic disease
   
P3 A patient with severe systemic disease
   
P4 A patient with severe systemic disease that is a constant threat to life
   
P5 A moribund patient who is not expected to survive without the operation
   
P6 A declared brain-dead patient whose organs are being removed for donor purposes

These definitions appear in each annual edition of the ASA Relative Value Guide. There is no additional information that will help you further define these categories.