ICD-10-PCS 2027 procedure code
099N7ZXDrainage of Nasopharynx, Via Natural or Artificial Opening, Diagnostic
Short description: Drainage of Nasopharynx, Via Opening, Diagn
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 099N7ZX
099N7ZX is the ICD-10-PCS code for a drainage procedure on the nasopharynx using a via natural or artificial opening 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 pharyngeal biopsy, the ICD-9-CM procedure title it maps to (29.12).
For a different body part, codes include 09937ZX (right external auditory canal), 09947ZX (left external auditory canal), 09957ZX (right middle ear), 09967ZX (left middle ear), 09977ZX (right tympanic membrane), 09987ZX (left tympanic membrane) and 20 more.
The same procedure with a different approach is coded 099N0ZX (open), 099N3ZX (percutaneous), 099N4ZX (percutaneous endoscopic) and 099N8ZX (via natural or artificial opening endoscopic).
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
- NNasopharynx
Includes: Choana; Fossa of Rosenmuller; Pharyngeal recess; Rhinopharynx
- 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
- ZNo Device
- 7. Qualifier
- XDiagnostic
Other versions of this procedure
Different body part
- 09937ZXExternal Auditory Canal, Right
- 09947ZXExternal Auditory Canal, Left
- 09957ZXMiddle Ear, Right
- 09967ZXMiddle Ear, Left
- 09977ZXTympanic Membrane, Right
- 09987ZXTympanic Membrane, Left
- 09997ZXAuditory Ossicle, Right
- 099A7ZXAuditory Ossicle, Left
- 099B7ZXMastoid Sinus, Right
- 099C7ZXMastoid Sinus, Left
- 099D7ZXInner Ear, Right
- 099E7ZXInner Ear, Left
Different approach
Different qualifier
ICD-9-CM equivalent
Converter →- 29.12Pharyngeal biopsyapproximate
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 099N7ZX
Is 099N7ZX a valid ICD-10-PCS code for 2027?
- Yes. 099N7ZX is valid for inpatient procedures from October 1, 2026 through September 30, 2027.
What is the ICD-9 procedure code for 099N7ZX?
- The CMS GEMs map 099N7ZX to ICD-9-CM 29.12 (Pharyngeal biopsy).