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ICD-10-PCS 2027 procedure code

00WE4YZRevision of Other Device in Cranial Nerve, Percutaneous Endoscopic Approach

✓ Valid for 2027

Short description: Revision of Other Device in Cranial Nrv, Perc Endo Approach

Code last changed in FY2018 (effective October 1, 2017). Source: official FY2027 ICD-10-PCS release from CMS. Page updated September 29, 2026. About our data

About 00WE4YZ

00WE4YZ is the ICD-10-PCS code for a revision procedure on the cranial nerve using a percutaneous endoscopic approach with other device. In ICD-10-PCS, revision means correcting, to the extent possible, a portion of a malfunctioning device or the position of a displaced device.

In plain terms, this corresponds to other incision of cranial and peripheral nerves, the ICD-9-CM procedure title it maps to (04.04).

For a different body part, codes include 00W04YZ (brain), 00W64YZ (cerebral ventricle), 00WU4YZ (spinal canal) and 00WV4YZ (spinal cord).

The same procedure with a different approach is coded 00WE0YZ (open) and 00WE3YZ (percutaneous).

With a different device, use 00WE40Z (drainage device), 00WE42Z (monitoring device), 00WE43Z (infusion device), 00WE47Z (autologous tissue substitute) and 00WE4MZ (neurostimulator lead).

It doesn't appear in the MS-DRG procedure index, so on its own it doesn't change the DRG assignment.

It was added in FY2018, effective October 1, 2017.

What each character means

1. Section
0Medical and Surgical
2. Body System
0Central Nervous System and Cranial Nerves
3. Operation
WRevision

Correcting, to the extent possible, a portion of a malfunctioning device or the position of a displaced device

Revision can include correcting a malfunctioning or displaced device by taking out or putting in components of the device such as a screw or pin

Includes: Adjustment of position of pacemaker lead, recementing of hip prosthesis

4. Body Part
ECranial Nerve
5. Approach
4Percutaneous Endoscopic

Entry, by puncture or minor incision, of instrumentation through the skin or mucous membrane and any other body layers necessary to reach and visualize the site of the procedure

6. Device
YOther Device

Includes: Alfapump(R) system

7. Qualifier
ZNo Qualifier

Other versions of this procedure

ICD-9-CM equivalent

Converter →
  • 04.04Other incision of cranial and peripheral nervesapproximate

From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2018 (effective 10/1/2017): Added
  • No changes since FY2018.

Common questions about 00WE4YZ

Is 00WE4YZ a valid ICD-10-PCS code for 2027?

Yes. 00WE4YZ is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

What is the ICD-9 procedure code for 00WE4YZ?

The CMS GEMs map 00WE4YZ to ICD-9-CM 04.04 (Other incision of cranial and peripheral nerves).