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ICD-10-PCS 2027 procedure code

009M00ZDrainage of Facial Nerve with Drainage Device, Open Approach

✓ 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 009M00Z

009M00Z is the ICD-10-PCS code for a drainage procedure on the facial nerve using an open approach with drainage device. 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 incision of cranial and peripheral nerves, the ICD-9-CM procedure title it maps to (04.04).

For a different body part, codes include 009000Z (brain), 009100Z (cerebral meninges), 009200Z (dura mater), 009300Z (epidural space, intracranial), 009400Z (subdural space, intracranial), 009500Z (subarachnoid space, intracranial) and 24 more.

The same procedure with a different approach is coded 009M30Z (percutaneous) and 009M40Z (percutaneous endoscopic).

With a different device, use 009M0ZZ (no device).

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) and DRG 042 (Peripheral, Cranial Nerve and Other Nervous System Procedures without CC/MCC), under the surgical category “Peripheral, Cranial Nerve and Other Nervous System 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
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
0Drainage Device

Includes: Cystostomy tube; Foley catheter; Percutaneous nephrostomy catheter; Thoracostomy tube

7. Qualifier
ZNo Qualifier

Other versions of this procedure

Different device

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 →
  • 04.04Other incision of cranial and peripheral nervesapproximate

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 009M00Z

Is 009M00Z a valid ICD-10-PCS code for 2027?

Yes. 009M00Z is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

Is 009M00Z an O.R. procedure?

Yes. 009M00Z is an O.R. procedure in MS-DRG v44.0.

What DRG does 009M00Z group to?

Depending on the principal diagnosis, 009M00Z can group to MS-DRG 040, MS-DRG 041 and MS-DRG 042.

What is the ICD-9 procedure code for 009M00Z?

The CMS GEMs map 009M00Z to ICD-9-CM 04.04 (Other incision of cranial and peripheral nerves).