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 2W3DX
Immobilization of Left Lower Arm using Other Device
Immobilization of Left Lower Arm using Brace
Immobilization of Left Lower Arm using Cast
Immobilization of Left Lower Arm using Splint