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 09R1X
Replacement of L Ext Ear with Autol Sub, Extern Approach
Replacement of L Ext Ear with Autol Sub, Open Approach
Replacement of L Ext Ear with Synth Sub, Extern Approach
Replacement of L Ext Ear with Nonaut Sub, Open Approach
Replacement of L Ext Ear with Synth Sub, Open Approach
Replacement of L Ext Ear with Nonaut Sub, Extern Approach