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ICD-10-PCS 2027 procedure code

0C9W0Z0Drainage of Upper Tooth, Open Approach, Single

✓ Valid for 2027

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 0C9W0Z0

0C9W0Z0 is the ICD-10-PCS code for a drainage procedure on the upper tooth using an open approach (qualifier: single). In ICD-10-PCS, drainage means taking or letting out fluids and/or gases from a body part.

In plain terms, this corresponds to other dental operations, the ICD-9-CM procedure title it maps to (24.99).

For a different body part, codes include 0C9X0Z0 (lower tooth).

The same procedure with a different approach is coded 0C9WXZ0 (external).

With a different device, use 0C9W000 (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
CMouth and Throat
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
WUpper Tooth
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
0Single

Other versions of this procedure

Different body part

Different approach

Different device

Different qualifier

ICD-9-CM equivalent

Converter →
  • 24.99Other dental operationsapproximate

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 0C9W0Z0

Is 0C9W0Z0 a valid ICD-10-PCS code for 2027?

Yes. 0C9W0Z0 is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

What is the ICD-9 procedure code for 0C9W0Z0?

The CMS GEMs map 0C9W0Z0 to ICD-9-CM 24.99 (Other dental operations).