ICD-10-PCS 2027 procedure code
09943ZZDrainage of Left External Auditory Canal, Percutaneous Approach
Short description: Drainage of Left External Auditory Canal, Perc 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 09943ZZ
09943ZZ is the ICD-10-PCS code for a drainage procedure on the left external auditory canal using a percutaneous 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 09903ZZ (right external ear), 09913ZZ (left external ear), 09933ZZ (right external auditory canal), 09973ZZ (right tympanic membrane), 09983ZZ (left tympanic membrane), 099B3ZZ (right mastoid sinus) and 16 more.
The same procedure with a different approach is coded 09940ZZ (open), 09944ZZ (percutaneous endoscopic), 09947ZZ (via natural or artificial opening), 09948ZZ (via natural or artificial opening endoscopic) and 0994XZZ (external).
With a different device, use 099430Z (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
- 3Percutaneous
Entry, by puncture or minor incision, of instrumentation through the skin or mucous membrane and any other body layers necessary to reach the site of the procedure
- 6. Device
- ZNo Device
- 7. Qualifier
- ZNo Qualifier
Other versions of this procedure
Different body part
- 09903ZZExternal Ear, Right
- 09913ZZExternal Ear, Left
- 09933ZZExternal Auditory Canal, Right
- 09973ZZTympanic Membrane, Right
- 09983ZZTympanic Membrane, Left
- 099B3ZZMastoid Sinus, Right
- 099C3ZZMastoid Sinus, Left
- 099F3ZZEustachian Tube, Right
- 099G3ZZEustachian Tube, Left
- 099K3ZZNasal Mucosa and Soft Tissue
- 099L3ZZNasal Turbinate
- 099M3ZZNasal Septum
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 09943ZZ
Is 09943ZZ a valid ICD-10-PCS code for 2027?
- Yes. 09943ZZ is valid for inpatient procedures from October 1, 2026 through September 30, 2027.
What is the ICD-9 procedure code for 09943ZZ?
- The CMS GEMs map 09943ZZ to ICD-9-CM 18.02 (Incision of external auditory canal).