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ICD-10-PCS 2027 procedure code

0N9R0ZZDrainage of Maxilla, Open Approach

✓ Valid for 2027

Code last changed in FY2018 (effective October 1, 2017). Source: official FY2027 ICD-10-PCS release from CMS. Page updated September 29, 2026. About our data

About 0N9R0ZZ

0N9R0ZZ is the ICD-10-PCS code for a drainage procedure on the maxilla using an open approach. In ICD-10-PCS, drainage means taking or letting out fluids and/or gases from a body part.

In plain terms, this corresponds to incision of gum or alveolar bone and other incision of facial bone, the ICD-9-CM procedure titles it maps to (24.0 and 76.09).

For a different body part, codes include 0N900ZZ (skull), 0N910ZZ (frontal bone), 0N930ZZ (right parietal bone), 0N940ZZ (left parietal bone), 0N950ZZ (right temporal bone), 0N960ZZ (left temporal bone) and 16 more.

The same procedure with a different approach is coded 0N9R3ZZ (percutaneous) and 0N9R4ZZ (percutaneous endoscopic).

With a different device, use 0N9R00Z (drainage 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
NHead and Facial Bones
3. Operation
9Drainage

Taking or letting out fluids and/or gases from a body part

The qualifier DIAGNOSTIC is used to identify drainage procedures that are biopsies

Includes: Thoracentesis, incision and drainage

4. Body Part
RMaxilla

Includes: Alveolar process of maxilla

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
ZNo Device
7. Qualifier
ZNo Qualifier

Other versions of this procedure

Different device

Different qualifier

ICD-9-CM equivalent

Converter →
  • 24.0Incision of gum or alveolar boneapproximate
  • 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)
  • FY2018 (effective 10/1/2017): Title revised — was “Drainage of Right Maxilla, Open Approach”

Common questions about 0N9R0ZZ

Is 0N9R0ZZ a valid ICD-10-PCS code for 2027?

Yes. 0N9R0ZZ is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

What is the ICD-9 procedure code for 0N9R0ZZ?

The CMS GEMs map 0N9R0ZZ to ICD-9-CM 24.0 (Incision of gum or alveolar bone) and 76.09 (Other incision of facial bone).