Skip to content
Dx

ICD-10-PCS 2027 procedure code

009540ZDrainage of Intracranial Subarachnoid Space with Drainage Device, Percutaneous Endoscopic Approach

✓ Valid for 2027O.R. procedure

Short description: Drain of Cran Subrac Spc with Drain Dev, Perc Endo Approach

Code last changed in FY2018 (effective October 1, 2017). Source: official FY2027 ICD-10-PCS release from CMS. Page updated September 29, 2026. About our data

About 009540Z

009540Z is the ICD-10-PCS code for a drainage procedure on the subarachnoid space, intracranial 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 intracranial ventricular shunt or anastomosis, the ICD-9-CM procedure title it maps to (02.22).

For a different body part, codes include 009040Z (brain), 009140Z (cerebral meninges), 009240Z (dura mater), 009340Z (epidural space, intracranial), 009440Z (subdural space, intracranial), 009640Z (cerebral ventricle) and 24 more.

The same procedure with a different approach is coded 009500Z (open) and 009530Z (percutaneous).

With a different device, use 00954ZZ (no device).

It is an operating-room procedure in the MS-DRG logic for DRG 023 (Craniotomy with Major Device Implant or Acute Complex CNS Principal Diagnosis with MCC or Antineoplastic Implant or Epilepsy with Neurostimulator), DRG 024 (Craniotomy with Major Device Implant or Acute Complex CNS Principal Diagnosis without MCC), DRG 025 (Craniotomy and Endovascular Intracranial Procedures with MCC), DRG 026 (Craniotomy and Endovascular Intracranial Procedures with CC) and DRG 027 (Craniotomy and Endovascular Intracranial Procedures without CC/MCC), under the surgical categories “Craniotomy with Major Device Implant or Acute Complex CNS Principal Diagnosis” and “Craniotomy and endovascular intracranial 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
5Subarachnoid Space, Intracranial

Includes: Cisterna Magna

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 →
  • 02.22Intracranial ventricular shunt or anastomosisapproximate

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)
  • FY2018 (effective 10/1/2017): Title revised — was “Drainage of Subarachnoid Space with Drainage Device, Percutaneous Endoscopic Approach”

Common questions about 009540Z

Is 009540Z a valid ICD-10-PCS code for 2027?

Yes. 009540Z is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

Is 009540Z an O.R. procedure?

Yes. 009540Z is an O.R. procedure in MS-DRG v44.0.

What DRG does 009540Z group to?

Depending on the principal diagnosis, 009540Z can group to MS-DRG 023, MS-DRG 024, MS-DRG 025, MS-DRG 026 and MS-DRG 027.

What is the ICD-9 procedure code for 009540Z?

The CMS GEMs map 009540Z to ICD-9-CM 02.22 (Intracranial ventricular shunt or anastomosis).