The Physiological Systems and Anatomical Regions body system is identified by the character “E” in the 2nd character position and grouped within the Administration 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.
3 = Administration
The 3rd character refers to the root operation or the objective of the procedure.
Physiological Systems and Anatomical Regions