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ICD-10-PCS 2027 procedure code

009K40ZDrainage of Trigeminal Nerve with Drainage Device, Percutaneous Endoscopic Approach

✓ Valid for 2027O.R. procedure

Short description: Drainage of Trigem Nrv with Drain Dev, Perc Endo Approach

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 009K40Z

009K40Z is the ICD-10-PCS code for a drainage procedure on the trigeminal nerve using a percutaneous endoscopic 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 009040Z (brain), 009140Z (cerebral meninges), 009240Z (dura mater), 009340Z (epidural space, intracranial), 009440Z (subdural space, intracranial), 009540Z (subarachnoid space, intracranial) and 24 more.

The same procedure with a different approach is coded 009K00Z (open) and 009K30Z (percutaneous).

With a different device, use 009K4ZZ (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
KTrigeminal Nerve

Includes: Fifth cranial nerve; Gasserian ganglion; Mandibular nerve; Maxillary nerve; Ophthalmic nerve; Trifacial nerve

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
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 009K40Z

Is 009K40Z a valid ICD-10-PCS code for 2027?

Yes. 009K40Z is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

Is 009K40Z an O.R. procedure?

Yes. 009K40Z is an O.R. procedure in MS-DRG v44.0.

What DRG does 009K40Z group to?

Depending on the principal diagnosis, 009K40Z can group to MS-DRG 040, MS-DRG 041 and MS-DRG 042.

What is the ICD-9 procedure code for 009K40Z?

The CMS GEMs map 009K40Z to ICD-9-CM 04.04 (Other incision of cranial and peripheral nerves).