ICD-10-PCS 2027 procedure code
099670ZDrainage of Left Middle Ear with Drainage Device, Via Natural or Artificial Opening
Short description: Drainage of Left Middle Ear with Drain Dev, Via Opening
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 099670Z
099670Z is the ICD-10-PCS code for a drainage procedure on the left middle ear 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 myringotomy with insertion of tube, the ICD-9-CM procedure title it maps to (20.01).
For a different body part, codes include 099370Z (right external auditory canal), 099470Z (left external auditory canal), 099570Z (right 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 099600Z (open) and 099680Z (via natural or artificial opening endoscopic).
With a different device, use 09967ZZ (no device).
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
- 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
- 6Middle Ear, Left
Includes: Oval window; Tympanic cavity
- 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
- 099370ZExternal Auditory Canal, Right
- 099470ZExternal Auditory Canal, Left
- 099570ZMiddle Ear, Right
- 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
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 →- 20.01Myringotomy with insertion of tubeapproximate
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 099670Z
Is 099670Z a valid ICD-10-PCS code for 2027?
- Yes. 099670Z is valid for inpatient procedures from October 1, 2026 through September 30, 2027.
Is 099670Z an O.R. procedure?
- Yes. 099670Z is an O.R. procedure in MS-DRG v44.0.
What DRG does 099670Z group to?
- Depending on the principal diagnosis, 099670Z can group to MS-DRG 143, MS-DRG 144 and MS-DRG 145.
What is the ICD-9 procedure code for 099670Z?
- The CMS GEMs map 099670Z to ICD-9-CM 20.01 (Myringotomy with insertion of tube).