ICD-10-PCS 2027 procedure code
099370ZDrainage of Right External Auditory Canal with Drainage Device, Via Natural or Artificial Opening
Short description: Drainage of R Ext Auditory Canal with Drain Dev, Via Opening
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 099370Z
099370Z is the ICD-10-PCS code for a drainage procedure on the right external auditory canal using a via natural or artificial opening approach with drainage device. 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 099470Z (left external auditory canal), 099570Z (right middle ear), 099670Z (left middle ear), 099770Z (right tympanic membrane), 099870Z (left tympanic membrane), 099970Z (right auditory ossicle) and 20 more.
The same procedure with a different approach is coded 099300Z (open), 099330Z (percutaneous), 099340Z (percutaneous endoscopic), 099380Z (via natural or artificial opening endoscopic) and 0993X0Z (external).
With a different device, use 09937ZZ (no 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
- 3External Auditory Canal, Right
- 5. Approach
- 7Via Natural or Artificial Opening
Entry of instrumentation through a natural or artificial external opening to reach the site of the procedure
- 6. Device
- 0Drainage Device
Includes: Cystostomy tube; Foley catheter; Percutaneous nephrostomy catheter; Thoracostomy tube
- 7. Qualifier
- ZNo Qualifier
Other versions of this procedure
Different body part
- 099470ZExternal Auditory Canal, Left
- 099570ZMiddle Ear, Right
- 099670ZMiddle Ear, Left
- 099770ZTympanic Membrane, Right
- 099870ZTympanic Membrane, Left
- 099970ZAuditory Ossicle, Right
- 099A70ZAuditory Ossicle, Left
- 099B70ZMastoid Sinus, Right
- 099C70ZMastoid Sinus, Left
- 099D70ZInner Ear, Right
- 099E70ZInner Ear, Left
- 099F70ZEustachian Tube, Right
Different approach
Different device
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 099370Z
Is 099370Z a valid ICD-10-PCS code for 2027?
- Yes. 099370Z is valid for inpatient procedures from October 1, 2026 through September 30, 2027.
What is the ICD-9 procedure code for 099370Z?
- The CMS GEMs map 099370Z to ICD-9-CM 18.02 (Incision of external auditory canal).