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ICD-10-PCS 2027 procedure code

00W04YZRevision of Other Device in Brain, Percutaneous Endoscopic Approach

✓ Valid for 2027

Short description: Revision of Other Device in Brain, 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 00W04YZ

00W04YZ is the ICD-10-PCS code for a revision procedure on the brain 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 brain, the ICD-9-CM procedure title it maps to (01.39).

For a different body part, codes include 00W64YZ (cerebral ventricle), 00WE4YZ (cranial nerve), 00WU4YZ (spinal canal) and 00WV4YZ (spinal cord).

The same procedure with a different approach is coded 00W00YZ (open) and 00W03YZ (percutaneous).

With a different device, use 00W040Z (drainage device), 00W042Z (monitoring device), 00W043Z (infusion device), 00W047Z (autologous tissue substitute), 00W04JZ (synthetic substitute), 00W04KZ (nonautologous tissue substitute) and 1 more.

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
0Brain

Includes: Cerebrum; Corpus callosum; Encephalon

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 →
  • 01.39Other incision of brainapproximate

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 00W04YZ

Is 00W04YZ a valid ICD-10-PCS code for 2027?

Yes. 00W04YZ is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

What is the ICD-9 procedure code for 00W04YZ?

The CMS GEMs map 00W04YZ to ICD-9-CM 01.39 (Other incision of brain).