The Approach Open is identified by number "0" and occupies the 5th position in the ICD10-PCS procedure code structure.
Below a selection of ICD 10 PCS codes related to 0UN90
Release Uterus, Percutaneous Endoscopic Approach
Release Uterus, Via Natural or Artificial Opening
Release Uterus, Via Natural or Artificial Opening Endoscopic
Release Uterus, Open Approach
Release Uterus, Percutaneous Approach