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ICD-10-PCS 2027 procedure code

0WW1XYZRevision of Other Device in Cranial Cavity, External Approach

✓ Valid for 2027

Short description: Revision of Other Device in Cranial Cavity, 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 0WW1XYZ

0WW1XYZ is the ICD-10-PCS code for a revision procedure on the cranial cavity using an external 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 miscellaneous procedures, the ICD-9-CM procedure title it maps to (99.99).

For a different body part, codes include 0WW0XYZ (head), 0WW2XYZ (face), 0WW4XYZ (upper jaw), 0WW5XYZ (lower jaw), 0WW6XYZ (neck), 0WW8XYZ (chest wall) and 15 more.

The same procedure with a different approach is coded 0WW10YZ (open), 0WW13YZ (percutaneous) and 0WW14YZ (percutaneous endoscopic).

With a different device, use 0WW1X0Z (drainage device), 0WW1X1Z (radioactive element), 0WW1X3Z (infusion device) and 0WW1XJZ (synthetic substitute).

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
WAnatomical Regions, General
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
1Cranial Cavity
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
YOther Device

Includes: Alfapump(R) system

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 0WW1XYZ

Is 0WW1XYZ a valid ICD-10-PCS code for 2027?

Yes. 0WW1XYZ is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

What is the ICD-9 procedure code for 0WW1XYZ?

The CMS GEMs map 0WW1XYZ to ICD-9-CM 99.99 (Other miscellaneous procedures).