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ICD-10-PCS 2027 procedure code

0N9P4ZXDrainage of Right Orbit, Percutaneous Endoscopic Approach, Diagnostic

✓ Valid for 2027O.R. procedure

Short description: Drainage of Right Orbit, Perc Endo Approach, 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 0N9P4ZX

0N9P4ZX is the ICD-10-PCS code for a drainage procedure on the right orbit using a percutaneous 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 other diagnostic procedures on orbit and eyeball, the ICD-9-CM procedure title it maps to (16.29).

For a different body part, codes include 0N904ZX (skull), 0N914ZX (frontal bone), 0N934ZX (right parietal bone), 0N944ZX (left parietal bone), 0N954ZX (right temporal bone), 0N964ZX (left temporal bone) and 16 more.

The same procedure with a different approach is coded 0N9P0ZX (open) and 0N9P3ZX (percutaneous).

It is an operating-room procedure in the MS-DRG logic for DRG 113 (Orbital Procedures with CC/MCC) and DRG 114 (Orbital Procedures without CC/MCC), under the surgical category “Orbital 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
NHead and Facial Bones
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
POrbit, Right
5. Approach
4Percutaneous Endoscopic

Entry, by puncture or minor incision, of instrumentation through the skin or mucous membrane and any other body layers necessary to reach and visualize the site of the procedure

6. Device
ZNo Device
7. Qualifier
XDiagnostic

Other versions of this procedure

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 02 · Diseases and Disorders of the Eye · Orbital Procedures

ICD-9-CM equivalent

Converter →
  • 16.29Other diagnostic procedures on orbit and eyeballapproximate

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 0N9P4ZX

Is 0N9P4ZX a valid ICD-10-PCS code for 2027?

Yes. 0N9P4ZX is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

Is 0N9P4ZX an O.R. procedure?

Yes. 0N9P4ZX is an O.R. procedure in MS-DRG v44.0.

What DRG does 0N9P4ZX group to?

Depending on the principal diagnosis, 0N9P4ZX can group to MS-DRG 113 and MS-DRG 114.

What is the ICD-9 procedure code for 0N9P4ZX?

The CMS GEMs map 0N9P4ZX to ICD-9-CM 16.29 (Other diagnostic procedures on orbit and eyeball).