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ICD-10-PCS 2027 procedure code

00WEX0ZRevision of Drainage Device in Cranial Nerve, External Approach

✓ Valid for 2027

Short description: Revision of Drainage Device in Cranial Nrv, Extern 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 00WEX0Z

00WEX0Z is the ICD-10-PCS code for a revision procedure on the cranial nerve using an external 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 miscellaneous procedures, the ICD-9-CM procedure title it maps to (99.99).

For a different body part, codes include 00W0X0Z (brain), 00W6X0Z (cerebral ventricle), 00WUX0Z (spinal canal) and 00WVX0Z (spinal cord).

The same procedure with a different approach is coded 00WE00Z (open), 00WE30Z (percutaneous) and 00WE40Z (percutaneous endoscopic).

With a different device, use 00WEX2Z (monitoring device), 00WEX3Z (infusion device), 00WEX7Z (autologous tissue substitute) and 00WEXMZ (neurostimulator lead).

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

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
XExternal

Procedures performed directly on the skin or mucous membrane and procedures performed indirectly by the application of external force through the skin or mucous membrane

6. Device
0Drainage Device

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

7. Qualifier
ZNo Qualifier

Other versions of this procedure

ICD-9-CM equivalent

Converter →
  • 99.99Other miscellaneous proceduresapproximate

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 00WEX0Z

Is 00WEX0Z a valid ICD-10-PCS code for 2027?

Yes. 00WEX0Z is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

What is the ICD-9 procedure code for 00WEX0Z?

The CMS GEMs map 00WEX0Z to ICD-9-CM 99.99 (Other miscellaneous procedures).