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ICD-10-PCS 2027 procedure code

09550ZZDestruction of Right Middle Ear, 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 09550ZZ

09550ZZ is the ICD-10-PCS code for a destruction procedure on the right middle ear using an open approach. In ICD-10-PCS, destruction means physical eradication of all or a portion of a body part by the direct use of energy, force, or a destructive agent.

In plain terms, this corresponds to other excision of middle ear, the ICD-9-CM procedure title it maps to (20.59).

For a different body part, codes include 09500ZZ (right external ear), 09510ZZ (left external ear), 09530ZZ (right external auditory canal), 09540ZZ (left external auditory canal), 09560ZZ (left middle ear), 09570ZZ (right tympanic membrane) and 22 more.

The same procedure with a different approach is coded 09558ZZ (via natural or artificial opening endoscopic).

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) and DRG 145 (Other Ear, Nose, Mouth and Throat O.R. Procedures without CC/MCC), under the surgical category “Other Ear, Nose, Mouth and Throat O.R. Procedures”.

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
5Destruction

Physical eradication of all or a portion of a body part by the direct use of energy, force, or a destructive agent

None of the body part is physically taken out

Includes: Fulguration of rectal polyp, cautery of skin lesion

4. Body Part
5Middle Ear, Right
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 →
  • 20.59Other excision of middle 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 09550ZZ

Is 09550ZZ a valid ICD-10-PCS code for 2027?

Yes. 09550ZZ is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

Is 09550ZZ an O.R. procedure?

Yes. 09550ZZ is an O.R. procedure in MS-DRG v44.0.

What DRG does 09550ZZ group to?

Depending on the principal diagnosis, 09550ZZ can group to MS-DRG 143, MS-DRG 144 and MS-DRG 145.

What is the ICD-9 procedure code for 09550ZZ?

The CMS GEMs map 09550ZZ to ICD-9-CM 20.59 (Other excision of middle ear).