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 2W3HX
Immobilization of Left Thumb using Brace
Immobilization of Left Thumb using Cast
Immobilization of Left Thumb using Other Device
Immobilization of Left Thumb using Splint