ICD-10-PCS 2027 procedure code
09940ZZDrainage of Left External Auditory Canal, 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 09940ZZ
09940ZZ is the ICD-10-PCS code for a drainage procedure on the left external auditory canal using an open approach. In ICD-10-PCS, drainage means taking or letting out fluids and/or gases from a body part.
In plain terms, this corresponds to incision of external auditory canal, the ICD-9-CM procedure title it maps to (18.02).
For a different body part, codes include 09900ZZ (right external ear), 09910ZZ (left external ear), 09930ZZ (right external auditory canal), 09950ZZ (right middle ear), 09960ZZ (left middle ear), 09970ZZ (right tympanic membrane) and 22 more.
The same procedure with a different approach is coded 09943ZZ (percutaneous), 09944ZZ (percutaneous endoscopic), 09947ZZ (via natural or artificial opening), 09948ZZ (via natural or artificial opening endoscopic) and 0994XZZ (external).
With a different device, use 099400Z (drainage device).
It doesn't appear in the MS-DRG procedure index, so on its own it doesn't change the DRG assignment.
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
- 9Drainage
Taking or letting out fluids and/or gases from a body part
The qualifier DIAGNOSTIC is used to identify drainage procedures that are biopsies
Includes: Thoracentesis, incision and drainage
- 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
Different body part
- 09900ZZExternal Ear, Right
- 09910ZZExternal Ear, Left
- 09930ZZExternal Auditory Canal, Right
- 09950ZZMiddle Ear, Right
- 09960ZZMiddle Ear, Left
- 09970ZZTympanic Membrane, Right
- 09980ZZTympanic Membrane, Left
- 09990ZZAuditory Ossicle, Right
- 099A0ZZAuditory Ossicle, Left
- 099B0ZZMastoid Sinus, Right
- 099C0ZZMastoid Sinus, Left
- 099D0ZZInner Ear, Right
Different approach
Different device
Different qualifier
ICD-9-CM equivalent
Converter →- 18.02Incision of external auditory canalapproximate
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
- FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
- No changes since FY2016.
Common questions about 09940ZZ
Is 09940ZZ a valid ICD-10-PCS code for 2027?
- Yes. 09940ZZ is valid for inpatient procedures from October 1, 2026 through September 30, 2027.
What is the ICD-9 procedure code for 09940ZZ?
- The CMS GEMs map 09940ZZ to ICD-9-CM 18.02 (Incision of external auditory canal).