The Body Part Trochlear Nerve is identified by letter "J" and occupies the 4th position in the ICD10-PCS procedure code structure.
Below a selection of ICD 10 PCS codes related to 00CJ
Extirpation of Matter from Trochlear Nerve, Open Approach
Extirpation of Matter from Trochlear Nerve, Perc Approach
Extirpation of Matter from Trochlear Nrv, Perc Endo Approach