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ICD-10-PCS Body System A
Extracorporeal or Systemic Assistance and Performance, Physiological Systems

The Physiological Systems body system is identified by the character “A” in the 2nd character position and grouped within the Extracorporeal or Systemic Assistance and Performance section of the ICD-10-PCS coding structure. The 2nd character of an ICD-10-PCS code defines the particular body system or general physiological system or anatomical region involved.

ICD-10-PCS code structure

Section:
  5 = Extracorporeal or Systemic Assistance and Performance

Body System:

  • A - Physiological Systems
See Terms used in Extracorporeal or Systemic Assistance and Performance

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

Physiological Systems

  • 5A0 - Assistance

    Taking over a portion of a physiological function by extracorporeal means

  • 5A1 - Performance

    Completely taking over a physiological function by extracorporeal means

  • 5A2 - Restoration

    Returning, or attempting to return, a physiological function to its original state by extracorporeal means.