The Body System or Region None is identified by letter "Z" and occupies the 4th position in the ICD10-PCS procedure code structure.
Below a selection of ICD 10 PCS codes related to F09Z
Hearing and Related Disorders Prevention Treatment
Auditory Processing Treatment
Auditory Processing Treatment using Other Equipment
Cerumen Management Treatment using Cerumen Mgmt Equipment
Hearing Counsel Treatment using AV Equipment
Cerumen Management Treatment
Hearing and Related Disorders Counseling Treatment
Hearing Prevent Treatment using AV Equipment
Auditory Processing Treatment using Audiovisual Equipment
Auditory Processing Treatment using Computer
Auditory Processing Treatment using Assist Listen Equipment