Skip to content
Dx

ICD-10-PCS 2027 procedure code

009M0ZXDrainage of Facial Nerve, Open Approach, Diagnostic

✓ Valid for 2027O.R. procedure

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 009M0ZX

009M0ZX is the ICD-10-PCS code for a drainage procedure on the facial nerve 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 cranial or peripheral nerve or ganglion, the ICD-9-CM procedure title it maps to (04.12).

For a different body part, codes include 00900ZX (brain), 00910ZX (cerebral meninges), 00920ZX (dura mater), 00930ZX (epidural space, intracranial), 00940ZX (subdural space, intracranial), 00950ZX (subarachnoid space, intracranial) and 24 more.

The same procedure with a different approach is coded 009M3ZX (percutaneous) and 009M4ZX (percutaneous endoscopic).

It is an operating-room procedure in the MS-DRG logic for DRG 040 (Peripheral, Cranial Nerve and Other Nervous System Procedures with MCC), DRG 041 (Peripheral, Cranial Nerve and Other Nervous System Procedures with CC or Peripheral Neurostimulator), DRG 042 (Peripheral, Cranial Nerve and Other Nervous System Procedures without CC/MCC), 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 categories “Peripheral, Cranial Nerve and Other Nervous System Procedures”, “Other Ear, Nose, Mouth and Throat O.R. Procedures”, “Other Musculoskeletal System and Connective Tissue O.R. Procedures” and 2 more.

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
0Central Nervous System and Cranial Nerves
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
MFacial Nerve

Includes: Chorda tympani; Geniculate ganglion; Greater superficial petrosal nerve; Nerve to the stapedius; Parotid plexus; Posterior auricular nerve; Seventh cranial nerve; Submandibular ganglion

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 qualifier

MS-DRG v44.0 grouping

All DRGs →

Surgical MS-DRGs this procedure can group to, depending on the principal diagnosis's MDC.

ICD-9-CM equivalent

Converter →
  • 04.12Open biopsy of cranial or peripheral nerve or ganglionapproximate

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 009M0ZX

Is 009M0ZX a valid ICD-10-PCS code for 2027?

Yes. 009M0ZX is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

Is 009M0ZX an O.R. procedure?

Yes. 009M0ZX is an O.R. procedure in MS-DRG v44.0.

What DRG does 009M0ZX group to?

Depending on the principal diagnosis, 009M0ZX can group to MS-DRG 040, MS-DRG 041, MS-DRG 042, MS-DRG 143, MS-DRG 144 and MS-DRG 145.

What is the ICD-9 procedure code for 009M0ZX?

The CMS GEMs map 009M0ZX to ICD-9-CM 04.12 (Open biopsy of cranial or peripheral nerve or ganglion).