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ICD-10-PCS 2027 procedure code

07WM00ZRevision of Drainage Device in Thymus, 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 07WM00Z

07WM00Z is the ICD-10-PCS code for a revision procedure on the thymus 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 incision of thymus, the ICD-9-CM procedure title it maps to (07.92).

For a different body part, codes include 07WK00Z (thoracic duct), 07WL00Z (cisterna chyli), 07WN00Z (lymphatic), 07WP00Z (spleen) and 07WT00Z (bone marrow).

The same procedure with a different approach is coded 07WM30Z (percutaneous), 07WM40Z (percutaneous endoscopic) and 07WMX0Z (external).

With a different device, use 07WM03Z (infusion device) and 07WM0YZ (other device).

It is an operating-room procedure in the MS-DRG logic for DRG 163 (Major Chest Procedures with MCC), DRG 164 (Major Chest Procedures with CC), DRG 165 (Major Chest Procedures without CC/MCC), DRG 628 (Other Endocrine, Nutritional and Metabolic O.R. Procedures with MCC or Insertion of Antibiotic-eluting Bone Void Filler), DRG 629 (Other Endocrine, Nutritional and Metabolic O.R. Procedures with CC) and DRG 630 (Other Endocrine, Nutritional and Metabolic O.R. Procedures without CC/MCC), under the surgical categories “Major Chest Procedures”, “Other Endocrine, Nutritional and Metabolic O.R. Procedures”, “Other O.R. Procedures of the Blood and Blood Forming Organs” and 4 more.

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

Common questions about 07WM00Z

Is 07WM00Z a valid ICD-10-PCS code for 2027?

Yes. 07WM00Z is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

Is 07WM00Z an O.R. procedure?

Yes. 07WM00Z is an O.R. procedure in MS-DRG v44.0.

What DRG does 07WM00Z group to?

Depending on the principal diagnosis, 07WM00Z can group to MS-DRG 163, MS-DRG 164, MS-DRG 165, MS-DRG 628, MS-DRG 629 and MS-DRG 630.

What is the ICD-9 procedure code for 07WM00Z?

The CMS GEMs map 07WM00Z to ICD-9-CM 07.92 (Other incision of thymus).