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ICD-10-PCS 2027 procedure code

09CB0ZZExtirpation of Matter from Right Mastoid Sinus, Open Approach

✓ Valid for 2027O.R. procedure

Short description: Extirpation of Matter from R Mastoid Sinus, 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 09CB0ZZ

09CB0ZZ is the ICD-10-PCS code for a extirpation procedure on the right mastoid sinus using an open approach. In ICD-10-PCS, extirpation means taking or cutting out solid matter from a body part.

In plain terms, this corresponds to incision of mastoid and incision of petrous pyramid air cells, the ICD-9-CM procedure titles it maps to (20.21 and 20.22).

For a different body part, codes include 09C00ZZ (right external ear), 09C10ZZ (left external ear), 09C30ZZ (right external auditory canal), 09C40ZZ (left external auditory canal), 09C50ZZ (right middle ear), 09C60ZZ (left middle ear) and 22 more.

The same procedure with a different approach is coded 09CB3ZZ (percutaneous), 09CB4ZZ (percutaneous endoscopic) and 09CB8ZZ (via natural or artificial opening endoscopic).

It is an operating-room procedure in the MS-DRG logic for DRG 135 (Sinus and Mastoid Procedures with CC/MCC) and DRG 136 (Sinus and Mastoid Procedures without CC/MCC), under the surgical category “Sinus and Mastoid 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
CExtirpation

Taking or cutting out solid matter from a body part

The solid matter may be an abnormal byproduct of a biological function or a foreign body; it may be imbedded in a body part or in the lumen of a tubular body part. The solid matter may or may not have been previously broken into pieces

Includes: Thrombectomy, choledocholithotomy

4. Body Part
BMastoid Sinus, 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.

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

ICD-9-CM equivalent

Converter →
  • 20.21Incision of mastoidapproximate
  • 20.22Incision of petrous pyramid air cellsapproximate

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 09CB0ZZ

Is 09CB0ZZ a valid ICD-10-PCS code for 2027?

Yes. 09CB0ZZ is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

Is 09CB0ZZ an O.R. procedure?

Yes. 09CB0ZZ is an O.R. procedure in MS-DRG v44.0.

What DRG does 09CB0ZZ group to?

Depending on the principal diagnosis, 09CB0ZZ can group to MS-DRG 135 and MS-DRG 136.

What is the ICD-9 procedure code for 09CB0ZZ?

The CMS GEMs map 09CB0ZZ to ICD-9-CM 20.21 (Incision of mastoid) and 20.22 (Incision of petrous pyramid air cells).