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ICD-10-PCS 2027 procedure code

07WM4YZRevision of Other Device in Thymus, Percutaneous Endoscopic Approach

✓ Valid for 2027

Short description: Revision of Other Device in Thymus, 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 07WM4YZ

07WM4YZ is the ICD-10-PCS code for a revision procedure on the thymus 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 thymus, the ICD-9-CM procedure title it maps to (07.92).

For a different body part, codes include 07WK4YZ (thoracic duct), 07WL4YZ (cisterna chyli), 07WN4YZ (lymphatic) and 07WP4YZ (spleen).

The same procedure with a different approach is coded 07WM0YZ (open) and 07WM3YZ (percutaneous).

With a different device, use 07WM40Z (drainage device) and 07WM43Z (infusion device).

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
7Lymphatic and Hemic Systems
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
MThymus

Includes: Thymus gland

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 →
  • 07.92Other incision of thymusapproximate

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 07WM4YZ

Is 07WM4YZ a valid ICD-10-PCS code for 2027?

Yes. 07WM4YZ is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

What is the ICD-9 procedure code for 07WM4YZ?

The CMS GEMs map 07WM4YZ to ICD-9-CM 07.92 (Other incision of thymus).