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ICD-10-PCS 2027 procedure code

009100ZDrainage of Cerebral Meninges with Drainage Device, Open Approach

✓ Valid for 2027O.R. procedure

Short description: Drainage of Cerebral Meninges with Drain Dev, Open 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 009100Z

009100Z is the ICD-10-PCS code for a drainage procedure on the cerebral meninges 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 incision of cerebral meninges, the ICD-9-CM procedure title it maps to (01.31).

For a different body part, codes include 009000Z (brain), 009200Z (dura mater), 009300Z (epidural space, intracranial), 009400Z (subdural space, intracranial), 009500Z (subarachnoid space, intracranial), 009600Z (cerebral ventricle) and 24 more.

The same procedure with a different approach is coded 009130Z (percutaneous) and 009140Z (percutaneous endoscopic).

With a different device, use 00910ZZ (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), DRG 027 (Craniotomy and Endovascular Intracranial Procedures without CC/MCC) and DRG 820 (Lymphoma and Leukemia with Major O.R. Procedures with MCC), under the surgical categories “Craniotomy with Major Device Implant or Acute Complex CNS Principal Diagnosis”, “Craniotomy and endovascular intracranial procedures”, “Lymphoma and Leukemia with Major O.R. Procedures” and 3 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
1Cerebral Meninges

Includes: Arachnoid mater, intracranial; Leptomeninges, intracranial; Pia mater, intracranial

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.

MDC 24 · Multiple Significant Trauma · Craniotomy for Multiple Significant Trauma

ICD-9-CM equivalent

Converter →
  • 01.31Incision of cerebral meningesapproximate

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 009100Z

Is 009100Z a valid ICD-10-PCS code for 2027?

Yes. 009100Z is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

Is 009100Z an O.R. procedure?

Yes. 009100Z is an O.R. procedure in MS-DRG v44.0.

What DRG does 009100Z group to?

Depending on the principal diagnosis, 009100Z can group to MS-DRG 023, MS-DRG 024, MS-DRG 025, MS-DRG 026, MS-DRG 027 and MS-DRG 820.

What is the ICD-9 procedure code for 009100Z?

The CMS GEMs map 009100Z to ICD-9-CM 01.31 (Incision of cerebral meninges).