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 0HWRX
Revision of Drainage Device in Toe Nail, External Approach
Revision of Autol Sub in Toe Nail, Extern Approach
Revision of Synth Sub in Toe Nail, Extern Approach
Revision of Nonaut Sub in Toe Nail, Extern Approach