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 09P7X
Remove Drain Dev from R Tympanic Membrane, Extern
Removal of Drain Dev from R Tympanic Membrane, Open Approach
Removal of Drainage Device from R Tympanic Membrane, Endo
Removal of Drain Dev from R Tympanic Membrane, Via Opening