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ICD-10-PCS 2027 procedure code

09Q40ZZRepair Left External Auditory Canal, Open Approach

✓ Valid for 2027O.R. procedure

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 09Q40ZZ

09Q40ZZ is the ICD-10-PCS code for a repair procedure on the left external auditory canal using an open approach. In ICD-10-PCS, repair means restoring, to the extent possible, a body part to its normal anatomic structure and function.

In plain terms, this corresponds to other plastic repair of external ear and other operations on external ear, the ICD-9-CM procedure titles it maps to (18.79 and 18.9).

For a different body part, codes include 09Q00ZZ (right external ear), 09Q10ZZ (left external ear), 09Q20ZZ (bilateral external ear), 09Q30ZZ (right external auditory canal), 09Q50ZZ (right middle ear), 09Q60ZZ (left middle ear) and 23 more.

The same procedure with a different approach is coded 09Q43ZZ (percutaneous), 09Q44ZZ (percutaneous endoscopic), 09Q47ZZ (via natural or artificial opening), 09Q48ZZ (via natural or artificial opening endoscopic) and 09Q4XZZ (external).

It is an operating-room procedure in the MS-DRG logic for DRG 143 (Other Ear, Nose, Mouth and Throat O.R. Procedures with MCC), DRG 144 (Other Ear, Nose, Mouth and Throat O.R. Procedures with CC), DRG 145 (Other Ear, Nose, Mouth and Throat O.R. 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) and DRG 581 (Other Skin, Subcutaneous Tissue and Breast Procedures without CC/MCC), under the surgical categories “Other Ear, Nose, Mouth and Throat O.R. 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
9Ear, Nose, Sinus
3. Operation
QRepair

Restoring, to the extent possible, a body part to its normal anatomic structure and function

Used only when the method to accomplish the repair is not one of the other root operations

Includes: Colostomy takedown, suture of laceration

4. Body Part
4External Auditory Canal, Left

Includes: External auditory meatus

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

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 →
  • 18.79Other plastic repair of external earapproximate
  • 18.9Other operations on external earapproximate

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 09Q40ZZ

Is 09Q40ZZ a valid ICD-10-PCS code for 2027?

Yes. 09Q40ZZ is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

Is 09Q40ZZ an O.R. procedure?

Yes. 09Q40ZZ is an O.R. procedure in MS-DRG v44.0.

What DRG does 09Q40ZZ group to?

Depending on the principal diagnosis, 09Q40ZZ can group to MS-DRG 143, MS-DRG 144, MS-DRG 145, MS-DRG 579, MS-DRG 580 and MS-DRG 581.

What is the ICD-9 procedure code for 09Q40ZZ?

The CMS GEMs map 09Q40ZZ to ICD-9-CM 18.79 (Other plastic repair of external ear) and 18.9 (Other operations on external ear).