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ICD-10-PCS 2027 procedure code

0HWU7NZRevision of Tissue Expander in Left Breast, Via Natural or Artificial Opening

✓ Valid for 2027

Short description: Revision of Tissue Expander in Left Breast, Via Opening

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 0HWU7NZ

0HWU7NZ is the ICD-10-PCS code for a revision procedure on the left breast using a via natural or artificial opening approach with tissue expander. 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 Mastotomy, the ICD-9-CM procedure title it maps to (85.0).

For a different body part, codes include 0HWT7NZ (right breast).

The same procedure with a different approach is coded 0HWU0NZ (open), 0HWU3NZ (percutaneous) and 0HWU8NZ (via natural or artificial opening endoscopic).

With a different device, use 0HWU70Z (drainage device), 0HWU77Z (autologous tissue substitute), 0HWU7JZ (synthetic substitute), 0HWU7KZ (nonautologous tissue substitute) and 0HWU7YZ (other device).

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
HSkin and Breast
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
UBreast, Left
5. Approach
7Via Natural or Artificial Opening

Entry of instrumentation through a natural or artificial external opening to reach the site of the procedure

6. Device
NTissue Expander
7. Qualifier
ZNo Qualifier

Other versions of this procedure

Different body part

ICD-9-CM equivalent

Converter →
  • 85.0Mastotomyapproximate

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 0HWU7NZ

Is 0HWU7NZ a valid ICD-10-PCS code for 2027?

Yes. 0HWU7NZ is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

What is the ICD-9 procedure code for 0HWU7NZ?

The CMS GEMs map 0HWU7NZ to ICD-9-CM 85.0 (Mastotomy).