ICD-10-PCS 2027 procedure code
09BC8ZXExcision of Left Mastoid Sinus, Via Natural or Artificial Opening Endoscopic, Diagnostic
Short description: Excision of Left Mastoid Sinus, Endo, Diagn
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 09BC8ZX
09BC8ZX is the ICD-10-PCS code for a excision procedure on the left mastoid sinus using a via natural or artificial opening endoscopic approach (qualifier: diagnostic). In ICD-10-PCS, excision means cutting out or off, without replacement, a portion of a body part.
In plain terms, this corresponds to biopsy of middle and inner ear, the ICD-9-CM procedure title it maps to (20.32).
For a different body part, codes include 09B38ZX (right external auditory canal), 09B48ZX (left external auditory canal), 09B58ZX (right middle ear), 09B68ZX (left middle ear), 09B78ZX (right tympanic membrane), 09B88ZX (left tympanic membrane) and 20 more.
The same procedure with a different approach is coded 09BC0ZX (open), 09BC3ZX (percutaneous) and 09BC4ZX (percutaneous 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 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
- BExcision
Cutting out or off, without replacement, a portion of a body part
The qualifier DIAGNOSTIC is used to identify excision procedures that are biopsies
Includes: Partial nephrectomy, liver biopsy
- 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
- XDiagnostic
Other versions of this procedure
Different body part
- 09B38ZXExternal Auditory Canal, Right
- 09B48ZXExternal Auditory Canal, Left
- 09B58ZXMiddle Ear, Right
- 09B68ZXMiddle Ear, Left
- 09B78ZXTympanic Membrane, Right
- 09B88ZXTympanic Membrane, Left
- 09B98ZXAuditory Ossicle, Right
- 09BA8ZXAuditory Ossicle, Left
- 09BB8ZXMastoid Sinus, Right
- 09BD8ZXInner Ear, Right
- 09BE8ZXInner Ear, Left
- 09BF8ZXEustachian Tube, Right
Different approach
Different qualifier
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 · Other Ear, Nose, Mouth and Throat O.R. Procedures
ICD-9-CM equivalent
Converter →- 20.32Biopsy of middle and inner earapproximate
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 09BC8ZX
Is 09BC8ZX a valid ICD-10-PCS code for 2027?
- Yes. 09BC8ZX is valid for inpatient procedures from October 1, 2026 through September 30, 2027.
Is 09BC8ZX an O.R. procedure?
- Yes. 09BC8ZX is an O.R. procedure in MS-DRG v44.0.
What DRG does 09BC8ZX group to?
- Depending on the principal diagnosis, 09BC8ZX can group to MS-DRG 143, MS-DRG 144 and MS-DRG 145.
What is the ICD-9 procedure code for 09BC8ZX?
- The CMS GEMs map 09BC8ZX to ICD-9-CM 20.32 (Biopsy of middle and inner ear).