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ICD-10-PCS 2027 procedure code

0CWY0YZRevision of Other Device in Mouth and Throat, Open Approach

✓ Valid for 2027O.R. procedure

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 0CWY0YZ

0CWY0YZ is the ICD-10-PCS code for a revision procedure on the mouth and throat using an open approach with other device. 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 incision of mouth, unspecified structure, the ICD-9-CM procedure title it maps to (27.92).

For a different body part, codes include 0CWA0YZ (salivary gland) and 0CWS0YZ (larynx).

The same procedure with a different approach is coded 0CWY3YZ (percutaneous), 0CWY7YZ (via natural or artificial opening) and 0CWY8YZ (via natural or artificial opening endoscopic).

With a different device, use 0CWY00Z (drainage device), 0CWY01Z (radioactive element), 0CWY07Z (autologous tissue substitute), 0CWY0DZ (intraluminal device), 0CWY0JZ (synthetic substitute) and 0CWY0KZ (nonautologous tissue substitute).

It is an operating-room procedure in the MS-DRG logic for DRG 137 (Mouth Procedures with CC/MCC), DRG 138 (Mouth Procedures without CC/MCC), DRG 579 (Other Skin, Subcutaneous Tissue and Breast Procedures with MCC), DRG 580 (Other Skin, Subcutaneous Tissue and Breast Procedures with CC), DRG 581 (Other Skin, Subcutaneous Tissue and Breast Procedures without CC/MCC) and DRG 907 (Other O.R. Procedures for Injuries with MCC), under the surgical categories “Mouth Procedures”, “Other Skin, Subcutaneous Tissue and Breast Procedures”, “Other O.R. Procedures for Injuries” and 1 more.

It was added in FY2018, effective October 1, 2017.

What each character means

1. Section
0Medical and Surgical
2. Body System
CMouth and Throat
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
YMouth and Throat
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
YOther Device

Includes: Alfapump(R) system

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.

MDC 03 · Diseases and Disorders of the Ear, Nose, Mouth and Throat · Mouth Procedures

ICD-9-CM equivalent

Converter →
  • 27.92Incision of mouth, unspecified structureapproximate

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
  • FY2018 (effective 10/1/2017): Added
  • No changes since FY2018.

Common questions about 0CWY0YZ

Is 0CWY0YZ a valid ICD-10-PCS code for 2027?

Yes. 0CWY0YZ is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

Is 0CWY0YZ an O.R. procedure?

Yes. 0CWY0YZ is an O.R. procedure in MS-DRG v44.0.

What DRG does 0CWY0YZ group to?

Depending on the principal diagnosis, 0CWY0YZ can group to MS-DRG 137, MS-DRG 138, MS-DRG 579, MS-DRG 580, MS-DRG 581 and MS-DRG 907.

What is the ICD-9 procedure code for 0CWY0YZ?

The CMS GEMs map 0CWY0YZ to ICD-9-CM 27.92 (Incision of mouth, unspecified structure).