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ICD-10-PCS 2027 procedure code

0NST04ZReposition Right Mandible with Internal Fixation Device, Open Approach

✓ Valid for 2027O.R. procedure

Short description: Reposition Right Mandible with Int Fix, Open 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 0NST04Z

0NST04Z is the ICD-10-PCS code for a reposition procedure on the right mandible using an open approach with internal fixation device. In ICD-10-PCS, reposition means moving to its normal location, or other suitable location, all or a portion of a body part.

In plain terms, this corresponds to open reduction of mandibular fracture and open reduction of alveolar fracture, the ICD-9-CM procedure titles it maps to (76.76 and 76.77).

For a different body part, codes include 0NS004Z (skull), 0NS104Z (frontal bone), 0NS304Z (right parietal bone), 0NS404Z (left parietal bone), 0NS504Z (right temporal bone), 0NS604Z (left temporal bone) and 16 more.

The same procedure with a different approach is coded 0NST34Z (percutaneous) and 0NST44Z (percutaneous endoscopic).

With a different device, use 0NST05Z (external fixation device) and 0NST0ZZ (no device).

It is an operating-room procedure in the MS-DRG logic for DRG 140 (Major Head and Neck Procedures with MCC), DRG 141 (Major Head and Neck Procedures with CC), DRG 142 (Major Head and Neck Procedures without CC/MCC), DRG 515 (Other Musculoskeletal System and Connective Tissue O.R. Procedures with MCC), DRG 516 (Other Musculoskeletal System and Connective Tissue O.R. Procedures with CC) and DRG 517 (Other Musculoskeletal System and Connective Tissue O.R. Procedures without CC/MCC), under the surgical categories “Major Head and Neck Procedures”, “Other Musculoskeletal System and Connective Tissue O.R. Procedures”, “Other O.R. Procedures for Injuries” and 1 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
NHead and Facial Bones
3. Operation
SReposition

Moving to its normal location, or other suitable location, all or a portion of a body part

The body part is moved to a new location from an abnormal location, or from a normal location where it is not functioning correctly. The body part may or may not be cut out or off to be moved to the new location

Includes: Reposition of undescended testicle, fracture reduction

4. Body Part
TMandible, Right
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
4Internal Fixation 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 →
  • 76.76Open reduction of mandibular fractureapproximate
  • 76.77Open reduction of alveolar fractureapproximate

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 0NST04Z

Is 0NST04Z a valid ICD-10-PCS code for 2027?

Yes. 0NST04Z is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

Is 0NST04Z an O.R. procedure?

Yes. 0NST04Z is an O.R. procedure in MS-DRG v44.0.

What DRG does 0NST04Z group to?

Depending on the principal diagnosis, 0NST04Z can group to MS-DRG 140, MS-DRG 141, MS-DRG 142, MS-DRG 515, MS-DRG 516 and MS-DRG 517.

What is the ICD-9 procedure code for 0NST04Z?

The CMS GEMs map 0NST04Z to ICD-9-CM 76.76 (Open reduction of mandibular fracture) and 76.77 (Open reduction of alveolar fracture).