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 2W34X
Immobilization of Chest Wall using Splint
Immobilization of Chest Wall using Brace
Immobilization of Chest Wall using Cast
Immobilization of Chest Wall using Other Device