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 09P8X
Remove Drain Dev from L Tympanic Membrane, Extern
Removal of Drain Dev from L Tympanic Membrane, Open Approach
Removal of Drain Dev from L Tympanic Membrane, Via Opening
Removal of Drainage Device from Left Tympanic Membrane, Endo