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 2W39X
Immobilization of Left Upper Extremity using Cast
Immobilization of Left Upper Extremity using Other Device
Immobilization of Left Upper Extremity using Splint
Immobilization of Left Upper Extremity using Brace