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  4. 5A - Physiological Systems

ICD-10-PCS Body System: ICD-10-PCS Body System 5A - Physiological Systems

The ICD-10-PCS root operation category Physiological Systems (section 5A) pertains to procedures that use extracorporeal methods to support or manage body functions. These operations involve assisting, performing, or restoring physiological functions outside the body.

Within this classification of Extracorporeal or Systemic Assistance and Performance, three specific types of procedures are defined. Assistance (5A0) involves taking over part of a physiological function to support the body temporarily. Performance (5A1) means completely substituting the function by extracorporeal means, such as when a machine fully performs the role of an organ. Lastly, Restoration (5A2) refers to efforts that return or attempt to return a physiological function to its normal state using external support. These distinctions are crucial for accurately coding procedures involving heart-lung machines, dialysis, or other life-support technologies, reflecting the specific nature of assistance provided to the physiological systems.

List of ICD-10-PCS procedures under ICD-10-PCS Body System 5A - 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