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 0GP0X
Removal of Drain Dev from Pituitary Gland, Perc Approach
Removal of Drain Dev from Pituitary Gland, Open Approach
Removal of Drain Dev from Pituitary Gland, Extern Approach
Remove of Drain Dev from Pituitary Gland, Perc Endo Approach