ICD-10-PCS code structure

Section:
  4 = Measurement and Monitoring

Body System:


See Terms used in Measurement and Monitoring

The 3rd character refers to the root operation or the objective of the procedure.

Physiological Systems

  • 4A0 - Measurement

    Determining the level of a physiological or physical function at a point in time

  • 4A1 - Monitoring

    Determining the level of a physiological or physical function repetitively over a period of time