The Diagnostic Audiology body system is identified by the character “1” in the 2nd character position and grouped within the Physical Rehabilitation and Diagnostic Audiology 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.
F = Physical Rehabilitation and Diagnostic Audiology
1- Diagnostic Audiology
The 3rd character refers to the root operation or the objective of the procedure.