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ICD-10-PCS 2027 procedure code

0NNM4ZZRelease Right Zygomatic Bone, Percutaneous Endoscopic Approach

✓ Valid for 2027O.R. procedure

Short description: Release Right Zygomatic 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 0NNM4ZZ

0NNM4ZZ is the ICD-10-PCS code for a release procedure on the right zygomatic bone using a percutaneous endoscopic approach. In ICD-10-PCS, release means freeing a body part from an abnormal physical constraint by cutting or by the use of force.

In plain terms, this corresponds to other facial bone repair, the ICD-9-CM procedure title it maps to (76.69).

For a different body part, codes include 0NN14ZZ (frontal bone), 0NN34ZZ (right parietal bone), 0NN44ZZ (left parietal bone), 0NN54ZZ (right temporal bone), 0NN64ZZ (left temporal bone), 0NN74ZZ (occipital bone) and 15 more.

The same procedure with a different approach is coded 0NNM0ZZ (open) and 0NNM3ZZ (percutaneous).

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), DRG 145 (Other Ear, Nose, Mouth and Throat O.R. Procedures without CC/MCC), DRG 907 (Other O.R. Procedures for Injuries with MCC), DRG 908 (Other O.R. Procedures for Injuries with CC) and DRG 909 (Other O.R. Procedures for Injuries without CC/MCC), under the surgical categories “Other Ear, Nose, Mouth and Throat O.R. Procedures”, “Other O.R. Procedures for Injuries” and “Other O.R. Procedures for Multiple Significant Trauma”.

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
NRelease

Freeing a body part from an abnormal physical constraint by cutting or by the use of force

Some of the restraining tissue may be taken out but none of the body part is taken out

Includes: Adhesiolysis, carpal tunnel release

4. Body Part
MZygomatic Bone, Right
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
ZNo Device
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 →
  • 76.69Other facial bone repairapproximate

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 0NNM4ZZ

Is 0NNM4ZZ a valid ICD-10-PCS code for 2027?

Yes. 0NNM4ZZ is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

Is 0NNM4ZZ an O.R. procedure?

Yes. 0NNM4ZZ is an O.R. procedure in MS-DRG v44.0.

What DRG does 0NNM4ZZ group to?

Depending on the principal diagnosis, 0NNM4ZZ can group to MS-DRG 143, MS-DRG 144, MS-DRG 145, MS-DRG 907, MS-DRG 908 and MS-DRG 909.

What is the ICD-9 procedure code for 0NNM4ZZ?

The CMS GEMs map 0NNM4ZZ to ICD-9-CM 76.69 (Other facial bone repair).