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 08RSX
Replacement of R Conjunctiva with Synth Sub, Extern Approach
Replacement of R Conjunctiva with Autol Sub, Extern Approach
Replace of R Conjunctiva with Nonaut Sub, Extern Approach