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ICD-10-PCS 2027 procedure code

0WW100ZRevision of Drainage Device in Cranial Cavity, Open Approach

✓ Valid for 2027O.R. procedure

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 0WW100Z

0WW100Z is the ICD-10-PCS code for a revision procedure on the cranial cavity using an open 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 craniotomy, the ICD-9-CM procedure title it maps to (01.24).

For a different body part, codes include 0WW000Z (head), 0WW200Z (face), 0WW400Z (upper jaw), 0WW500Z (lower jaw), 0WW600Z (neck), 0WW800Z (chest wall) and 12 more.

The same procedure with a different approach is coded 0WW130Z (percutaneous), 0WW140Z (percutaneous endoscopic) and 0WW1X0Z (external).

With a different device, use 0WW101Z (radioactive element), 0WW103Z (infusion device), 0WW10JZ (synthetic substitute) and 0WW10YZ (other device).

It is an operating-room procedure in the MS-DRG logic for DRG 023 (Craniotomy with Major Device Implant or Acute Complex CNS Principal Diagnosis with MCC or Antineoplastic Implant or Epilepsy with Neurostimulator), DRG 024 (Craniotomy with Major Device Implant or Acute Complex CNS Principal Diagnosis without MCC), DRG 025 (Craniotomy and Endovascular Intracranial Procedures with MCC), DRG 026 (Craniotomy and Endovascular Intracranial Procedures with CC) and DRG 027 (Craniotomy and Endovascular Intracranial Procedures without CC/MCC), under the surgical categories “Craniotomy with Major Device Implant or Acute Complex CNS Principal Diagnosis” and “Craniotomy and endovascular intracranial 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
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
0Open

Cutting through the skin or mucous membrane and any other body layers necessary to expose 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 →
  • 01.24Other craniotomyapproximate

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 0WW100Z

Is 0WW100Z a valid ICD-10-PCS code for 2027?

Yes. 0WW100Z is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

Is 0WW100Z an O.R. procedure?

Yes. 0WW100Z is an O.R. procedure in MS-DRG v44.0.

What DRG does 0WW100Z group to?

Depending on the principal diagnosis, 0WW100Z can group to MS-DRG 023, MS-DRG 024, MS-DRG 025, MS-DRG 026 and MS-DRG 027.

What is the ICD-9 procedure code for 0WW100Z?

The CMS GEMs map 0WW100Z to ICD-9-CM 01.24 (Other craniotomy).