ICD-10-PCS 2027 procedure code
099P0ZXDrainage of Accessory Sinus, Open Approach, Diagnostic
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 099P0ZX
099P0ZX is the ICD-10-PCS code for a drainage procedure on the accessory sinus using an open approach (qualifier: diagnostic). In ICD-10-PCS, drainage means taking or letting out fluids and/or gases from a body part.
In plain terms, this corresponds to open biopsy of nasal sinus, the ICD-9-CM procedure title it maps to (22.12).
For a different body part, codes include 09900ZX (right external ear), 09910ZX (left external ear), 09930ZX (right external auditory canal), 09940ZX (left external auditory canal), 09950ZX (right middle ear), 09960ZX (left middle ear) and 22 more.
The same procedure with a different approach is coded 099P3ZX (percutaneous), 099P4ZX (percutaneous endoscopic), 099P7ZX (via natural or artificial opening) and 099P8ZX (via natural or artificial opening endoscopic).
It is an operating-room procedure in the MS-DRG logic for DRG 135 (Sinus and Mastoid Procedures with CC/MCC) and DRG 136 (Sinus and Mastoid Procedures without CC/MCC), under the surgical category “Sinus and Mastoid Procedures”.
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
- PAccessory Sinus
- 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
- XDiagnostic
Other versions of this procedure
Different body part
- 09900ZXExternal Ear, Right
- 09910ZXExternal Ear, Left
- 09930ZXExternal Auditory Canal, Right
- 09940ZXExternal Auditory Canal, Left
- 09950ZXMiddle Ear, Right
- 09960ZXMiddle Ear, Left
- 09970ZXTympanic Membrane, Right
- 09980ZXTympanic Membrane, Left
- 09990ZXAuditory Ossicle, Right
- 099A0ZXAuditory Ossicle, Left
- 099B0ZXMastoid Sinus, Right
- 099C0ZXMastoid Sinus, Left
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 · Sinus and Mastoid Procedures
ICD-9-CM equivalent
Converter →- 22.12Open biopsy of nasal sinusapproximate
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 099P0ZX
Is 099P0ZX a valid ICD-10-PCS code for 2027?
- Yes. 099P0ZX is valid for inpatient procedures from October 1, 2026 through September 30, 2027.
Is 099P0ZX an O.R. procedure?
- Yes. 099P0ZX is an O.R. procedure in MS-DRG v44.0.
What DRG does 099P0ZX group to?
- Depending on the principal diagnosis, 099P0ZX can group to MS-DRG 135 and MS-DRG 136.
What is the ICD-9 procedure code for 099P0ZX?
- The CMS GEMs map 099P0ZX to ICD-9-CM 22.12 (Open biopsy of nasal sinus).