ICD-10-PCS 2027 procedure code
09TC8ZZResection of Left Mastoid Sinus, Via Natural or Artificial Opening Endoscopic
Short description: Resection of Left Mastoid Sinus, Endo
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 09TC8ZZ
09TC8ZZ is the ICD-10-PCS code for a resection procedure on the left mastoid sinus using a via natural or artificial opening endoscopic approach. In ICD-10-PCS, resection means cutting out or off, without replacement, all of a body part.
In plain terms, this corresponds to radical mastoidectomy, the ICD-9-CM procedure title it maps to (20.42).
For a different body part, codes include 09T58ZZ (right middle ear), 09T68ZZ (left middle ear), 09T78ZZ (right tympanic membrane), 09T88ZZ (left tympanic membrane), 09T98ZZ (right auditory ossicle), 09TA8ZZ (left auditory ossicle) and 18 more.
The same procedure with a different approach is coded 09TC0ZZ (open) and 09TC4ZZ (percutaneous 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 was added in FY2018, effective October 1, 2017.
What each character means
- 1. Section
- 0Medical and Surgical
- 2. Body System
- 9Ear, Nose, Sinus
- 3. Operation
- TResection
Cutting out or off, without replacement, all of a body part
Includes: Total nephrectomy, total lobectomy of lung
- 4. Body Part
- CMastoid Sinus, Left
Includes: Mastoid air cells
- 5. Approach
- 8Via Natural or Artificial Opening Endoscopic
Entry of instrumentation through a natural or artificial external opening to reach and visualize the site of the procedure
- 6. Device
- ZNo Device
- 7. Qualifier
- ZNo Qualifier
Other versions of this procedure
Different body part
- 09T58ZZMiddle Ear, Right
- 09T68ZZMiddle Ear, Left
- 09T78ZZTympanic Membrane, Right
- 09T88ZZTympanic Membrane, Left
- 09T98ZZAuditory Ossicle, Right
- 09TA8ZZAuditory Ossicle, Left
- 09TB8ZZMastoid Sinus, Right
- 09TD8ZZInner Ear, Right
- 09TE8ZZInner Ear, Left
- 09TF8ZZEustachian Tube, Right
- 09TG8ZZEustachian Tube, Left
- 09TK8ZZNasal Mucosa and Soft Tissue
Different approach
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 →- 20.42Radical mastoidectomyapproximate
From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2018 (effective 10/1/2017): Added
- No changes since FY2018.
Common questions about 09TC8ZZ
Is 09TC8ZZ a valid ICD-10-PCS code for 2027?
- Yes. 09TC8ZZ is valid for inpatient procedures from October 1, 2026 through September 30, 2027.
Is 09TC8ZZ an O.R. procedure?
- Yes. 09TC8ZZ is an O.R. procedure in MS-DRG v44.0.
What DRG does 09TC8ZZ group to?
- Depending on the principal diagnosis, 09TC8ZZ can group to MS-DRG 135 and MS-DRG 136.
What is the ICD-9 procedure code for 09TC8ZZ?
- The CMS GEMs map 09TC8ZZ to ICD-9-CM 20.42 (Radical mastoidectomy).