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ICD-10-PCS 2027 procedure code

00C50ZZExtirpation of Matter from Intracranial Subarachnoid Space, Open Approach

✓ Valid for 2027O.R. procedure

Short description: Extirpation of Matter from Cran Subrac Spc, Open 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 00C50ZZ

00C50ZZ is the ICD-10-PCS code for a extirpation procedure on the subarachnoid space, intracranial using an open approach. In ICD-10-PCS, extirpation means taking or cutting out solid matter 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 00C00ZZ (brain), 00C10ZZ (cerebral meninges), 00C20ZZ (dura mater), 00C30ZZ (epidural space, intracranial), 00C40ZZ (subdural space, intracranial), 00C60ZZ (cerebral ventricle) and 24 more.

The same procedure with a different approach is coded 00C53ZZ (percutaneous) and 00C54ZZ (percutaneous endoscopic).

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
CExtirpation

Taking or cutting out solid matter from a body part

The solid matter may be an abnormal byproduct of a biological function or a foreign body; it may be imbedded in a body part or in the lumen of a tubular body part. The solid matter may or may not have been previously broken into pieces

Includes: Thrombectomy, choledocholithotomy

4. Body Part
5Subarachnoid Space, Intracranial

Includes: Cisterna Magna

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
ZNo Qualifier

Other versions of this procedure

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)
  • FY2018 (effective 10/1/2017): Title revised — was “Extirpation of Matter from Subarachnoid Space, Open Approach”

Common questions about 00C50ZZ

Is 00C50ZZ a valid ICD-10-PCS code for 2027?

Yes. 00C50ZZ is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

Is 00C50ZZ an O.R. procedure?

Yes. 00C50ZZ is an O.R. procedure in MS-DRG v44.0.

What DRG does 00C50ZZ group to?

Depending on the principal diagnosis, 00C50ZZ 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 00C50ZZ?

The CMS GEMs map 00C50ZZ to ICD-9-CM 01.31 (Incision of cerebral meninges).