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ICD-10-PCS 2027 procedure code

0NWW4MZRevision of Bone Growth Stimulator in Facial Bone, Percutaneous Endoscopic Approach

✓ Valid for 2027O.R. procedure

Short description: Revision of Bone Stim in Facial Bone, Perc Endo 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 0NWW4MZ

0NWW4MZ is the ICD-10-PCS code for a revision procedure on the facial bone using a percutaneous endoscopic approach with bone growth stimulator. 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 facial bone, the ICD-9-CM procedure title it maps to (76.09).

For a different body part, codes include 0NW04MZ (skull) and 0NWB4MZ (nasal bone).

The same procedure with a different approach is coded 0NWW0MZ (open), 0NWW3MZ (percutaneous) and 0NWWXMZ (external).

With a different device, use 0NWW40Z (drainage device), 0NWW44Z (internal fixation device), 0NWW45Z (external fixation device), 0NWW47Z (autologous tissue substitute), 0NWW4JZ (synthetic substitute) and 0NWW4KZ (nonautologous tissue substitute).

It is an operating-room procedure in the MS-DRG logic for DRG 143 (Other Ear, Nose, Mouth and Throat O.R. Procedures with MCC), DRG 144 (Other Ear, Nose, Mouth and Throat O.R. Procedures with CC) and DRG 145 (Other Ear, Nose, Mouth and Throat O.R. Procedures without CC/MCC), under the surgical category “Other Ear, Nose, Mouth and Throat O.R. 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
NHead and Facial Bones
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
WFacial Bone
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
MBone Growth Stimulator
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 →
  • 76.09Other incision of facial boneapproximate

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 0NWW4MZ

Is 0NWW4MZ a valid ICD-10-PCS code for 2027?

Yes. 0NWW4MZ is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

Is 0NWW4MZ an O.R. procedure?

Yes. 0NWW4MZ is an O.R. procedure in MS-DRG v44.0.

What DRG does 0NWW4MZ group to?

Depending on the principal diagnosis, 0NWW4MZ can group to MS-DRG 143, MS-DRG 144 and MS-DRG 145.

What is the ICD-9 procedure code for 0NWW4MZ?

The CMS GEMs map 0NWW4MZ to ICD-9-CM 76.09 (Other incision of facial bone).