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ICD-10-PCS 2027 procedure code

0WH303ZInsertion of Infusion Device into Oral Cavity and Throat, Open Approach

✓ Valid for 2027O.R. procedure

Short description: Insert of Infusion Dev into Oral Cav & Throat, 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 0WH303Z

0WH303Z is the ICD-10-PCS code for a insertion procedure on the oral cavity and throat using an open approach with infusion device. In ICD-10-PCS, insertion means putting in a nonbiological appliance that monitors, assists, performs, or prevents a physiological function but does not physically take the place of a body part.

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 0WH003Z (head), 0WH103Z (cranial cavity), 0WH203Z (face), 0WH403Z (upper jaw), 0WH503Z (lower jaw), 0WH603Z (neck) and 16 more.

The same procedure with a different approach is coded 0WH333Z (percutaneous) and 0WH343Z (percutaneous endoscopic).

With a different device, use 0WH301Z (radioactive element) and 0WH30YZ (other device).

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 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
WAnatomical Regions, General
3. Operation
HInsertion

Putting in a nonbiological appliance that monitors, assists, performs, or prevents a physiological function but does not physically take the place of a body part

Includes: Insertion of radioactive implant, insertion of central venous catheter

4. Body Part
3Oral Cavity 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
3Infusion Device

Includes: Ascenda Intrathecal Catheter; InDura, intrathecal catheter (1P) (spinal); Non-tunneled central venous catheter; Peripherally inserted central catheter (PICC); Tunneled spinal (intrathecal) catheter

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
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about 0WH303Z

Is 0WH303Z a valid ICD-10-PCS code for 2027?

Yes. 0WH303Z is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

Is 0WH303Z an O.R. procedure?

Yes. 0WH303Z is an O.R. procedure in MS-DRG v44.0.

What DRG does 0WH303Z group to?

Depending on the principal diagnosis, 0WH303Z 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 0WH303Z?

The CMS GEMs map 0WH303Z to ICD-9-CM 27.92 (Incision of mouth, unspecified structure).