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ICD-10-PCS 2027 procedure code

0C9M8ZXDrainage of Pharynx, Via Natural or Artificial Opening Endoscopic, Diagnostic

✓ Valid for 2027

Short description: Drainage of Pharynx, Endo, 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 0C9M8ZX

0C9M8ZX is the ICD-10-PCS code for a drainage procedure on the pharynx using a via natural or artificial opening endoscopic 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 0C9R8ZX (epiglottis), 0C9S8ZX (larynx), 0C9T8ZX (right vocal cord) and 0C9V8ZX (left vocal cord).

The same procedure with a different approach is coded 0C9M0ZX (open), 0C9M3ZX (percutaneous), 0C9M4ZX (percutaneous endoscopic) and 0C9M7ZX (via natural or artificial opening).

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
CMouth and Throat
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
MPharynx

Includes: Base of Tongue; Hypopharynx; Laryngopharynx; Lingual tonsil; Oropharynx; Piriform recess (sinus); Tongue, base of

5. Approach
8Via Natural or Artificial Opening Endoscopic

Entry of instrumentation through a natural or artificial external opening to reach and visualize the site of the procedure

6. Device
ZNo Device
7. Qualifier
XDiagnostic

Other versions of this procedure

Different qualifier

ICD-9-CM equivalent

Converter →
  • 29.12Pharyngeal biopsyapproximate

From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about 0C9M8ZX

Is 0C9M8ZX a valid ICD-10-PCS code for 2027?

Yes. 0C9M8ZX is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

What is the ICD-9 procedure code for 0C9M8ZX?

The CMS GEMs map 0C9M8ZX to ICD-9-CM 29.12 (Pharyngeal biopsy).