The Approach External is identified by letter "X" and occupies the 5th position in the ICD10-PCS procedure code structure.
Below a selection of ICD 10 PCS codes related to 0HPRX
Removal of Drainage Device from Toe Nail, External Approach
Removal of Synth Sub from Toe Nail, Extern Approach
Removal of Autol Sub from Toe Nail, Extern Approach
Removal of Nonaut Sub from Toe Nail, Extern Approach