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ICD-10-PCS 2027 procedure code

00WE40ZRevision of Drainage Device in Cranial Nerve, Percutaneous Endoscopic Approach

✓ Valid for 2027O.R. procedure

Short description: Revision of Drain Dev in Cranial Nrv, Perc Endo Approach

Code unchanged since ICD-10-PCS took effect on October 1, 2015. Source: official FY2027 ICD-10-PCS release from CMS. Page updated September 29, 2026. About our data

About 00WE40Z

00WE40Z is the ICD-10-PCS code for a revision procedure on the cranial nerve using a percutaneous endoscopic approach with drainage 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 00W040Z (brain), 00W640Z (cerebral ventricle), 00WU40Z (spinal canal) and 00WV40Z (spinal cord).

The same procedure with a different approach is coded 00WE00Z (open), 00WE30Z (percutaneous) and 00WEX0Z (external).

With a different device, use 00WE42Z (monitoring device), 00WE43Z (infusion device), 00WE47Z (autologous tissue substitute), 00WE4MZ (neurostimulator lead) and 00WE4YZ (other device).

It is an operating-room procedure in the MS-DRG logic for DRG 040 (Peripheral, Cranial Nerve and Other Nervous System Procedures with MCC), DRG 041 (Peripheral, Cranial Nerve and Other Nervous System Procedures with CC or Peripheral Neurostimulator) and DRG 042 (Peripheral, Cranial Nerve and Other Nervous System Procedures without CC/MCC), under the surgical category “Peripheral, Cranial Nerve and Other Nervous System Procedures”.

It has been valid since ICD-10-PCS took effect on October 1, 2015.

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
0Drainage Device

Includes: Cystostomy tube; Foley catheter; Percutaneous nephrostomy catheter; Thoracostomy tube

7. Qualifier
ZNo Qualifier

Other versions of this procedure

MS-DRG v44.0 grouping

All DRGs →

Surgical MS-DRGs this procedure can group to, depending on the principal diagnosis's MDC.

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
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about 00WE40Z

Is 00WE40Z a valid ICD-10-PCS code for 2027?

Yes. 00WE40Z is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

Is 00WE40Z an O.R. procedure?

Yes. 00WE40Z is an O.R. procedure in MS-DRG v44.0.

What DRG does 00WE40Z group to?

Depending on the principal diagnosis, 00WE40Z can group to MS-DRG 040, MS-DRG 041 and MS-DRG 042.

What is the ICD-9 procedure code for 00WE40Z?

The CMS GEMs map 00WE40Z to ICD-9-CM 04.04 (Other incision of cranial and peripheral nerves).