ICD-10-PCS Code For Subdural Space: Procedure Code Group Overview

The International Classification of Diseases, Tenth Revision, Procedure Coding System (ICD-10-PCS) code group 0094 includes procedures performed to drain fluids or gases from the subdural space, intracranial. These ICD-10-PCS codes are used for inpatient documentation when a patient requires evacuation of subdural fluid or hematoma to relieve intracranial pressure or treat neurologic compromise. Accurate coding within the ICD-10-PCS 0094 group is essential for proper inpatient reimbursement, as it captures the procedure performed and supports clinical documentation accuracy.

Customize your policy alerts

Sign up for ICD-10-PCS Code For Subdural Space: Procedure Code Group Overview policy alerts

Get alerted when relevant policies change without checking for updates manually.

Monitor payer policy activity

Receive email alerts as soon as relevant payer policies are published or updated.

Subdural Space Drainage Procedure Overview

This procedure group includes drainage operations performed on the subdural space and targets the central nervous system and cranial nerves. Procedures involve removing fluid or blood from the subdural space to relieve pressure and prevent further neurologic injury. Accurate coding of these drainage procedures supports appropriate inpatient reimbursement and reflects the clinical resources used.

Code Attributes

Character	ICD-10-PCS Category	Code Group Details
0	Section	Medical and Surgical
0	Body System	Central Nervous System and Cranial Nerves
9	Operation	Drainage
4	Body Part	Subdural Space, Intracranial

Explore openpayer tools

View all tools

ICD-10-PCS Code For Subdural Space: Procedure Code Group Overview

Customize your policy alerts

Sign up for ICD-10-PCS Code For Subdural Space: Procedure Code Group Overview policy alerts

Get alerted when relevant policies change without checking for updates manually.

Monitor payer policy activity

Receive email alerts as soon as relevant payer policies are published or updated.

Subdural Space Drainage Procedure Overview

Code Attributes

Character	ICD-10-PCS Category	Code Group Details
0	Section	Medical and Surgical
0	Body System	Central Nervous System and Cranial Nerves
9	Operation	Drainage
4	Body Part	Subdural Space, Intracranial

When to Use

Use a code from this group when a clinician performs drainage of the intracranial subdural space, such as evacuation of a subdural hematoma or subdural effusion. These codes apply when the primary intent of the procedure is removal of fluid or blood from the subdural space to address neurologic compromise.

ICD-10-PCS Codes

9 rows

ICD-10-PCS Code	Description
009400Z	Drainage of Intracranial Subdural Space with Drainage Device, Open Approach
00940ZX	Drainage of Intracranial Subdural Space, Open Approach, Diagnostic
00940ZZ	Drainage of Intracranial Subdural Space, Open Approach
009430Z	Drainage of Intracranial Subdural Space with Drainage Device, Percutaneous Approach
00943ZX	Drainage of Intracranial Subdural Space, Percutaneous Approach, Diagnostic
00943ZZ	Drainage of Intracranial Subdural Space, Percutaneous Approach
009440Z	Drainage of Intracranial Subdural Space with Drainage Device, Percutaneous Endoscopic Approach
00944ZX	Drainage of Intracranial Subdural Space, Percutaneous Endoscopic Approach, Diagnostic
00944ZZ	Drainage of Intracranial Subdural Space, Percutaneous Endoscopic Approach

DRG Codes

15 rows

DRG Code	Description
023	Craniotomy with Major Device Implant or Acute Complex CNS Principal Diagnosis with MCC or Antineoplastic Implant or Epilepsy with Neurostimulator
024	Craniotomy with Major Device Implant or Acute Complex CNS Principal Diagnosis without MCC
025	Craniotomy and Endovascular Intracranial Procedures with MCC
026	Craniotomy and Endovascular Intracranial Procedures with CC
027	Craniotomy and Endovascular Intracranial Procedures without CC/MCC
820	Lymphoma and Leukemia with Major O.R. Procedures with MCC
821	Lymphoma and Leukemia with Major O.R. Procedures with CC
822	Lymphoma and Leukemia with Major O.R. Procedures without CC/MCC
826	Myeloproliferative Disorders or Poorly Differentiated Neoplasms with Major O.R. Procedures with MCC
827	Myeloproliferative Disorders or Poorly Differentiated Neoplasms with Major O.R. Procedures with CC

Showing 1–10 of 15

Typical Clinical Scenarios

An elderly patient presents to the emergency department after a fall with progressive unilateral weakness and decreasing level of consciousness. CT scan reveals a large acute subdural hematoma causing significant mass effect and midline shift; neurosurgery performs an open craniotomy to evacuate the hematoma and places a subdural drain to continue postoperative drainage. A drainage code that reflects an open approach with placement of a drainage device is appropriate to document the evacuation and drain insertion. Typical codes: 009400Z
A middle-aged patient with a history of chronic subdural hygroma experiences gradual cognitive decline and headaches over weeks; imaging shows a chronic subdural fluid collection amenable to percutaneous burr hole drainage. Neurosurgery schedules a planned percutaneous bedside or operating room drainage to evacuate the subdural fluid and may leave a catheter for temporary drainage. A percutaneous approach code that includes use of a drainage device best represents this elective drainage procedure. Typical codes: 009430Z
A postoperative patient who previously had a subdural drain develops recurrent collection and signs of persistent mass effect; a surgeon returns to the operating room to explore and re-evacuate the subdural space but does not place a new drain, performing diagnostic exploration and evacuation only. This scenario is coded to reflect an open diagnostic drainage procedure without placement of a drainage device. Typical codes: 00940ZX

Related Codes

0090-BRAIN-DRAINAGE

ICD-10-PCS Code For Brain: Procedure Code Group Overview

0091-CEREBRAL-MENINGES-TAKING-OR-LETTING-OUT-FLUIDS-CEREBRAL-MENINGES

ICD-10-PCS Code For Cerebral Meninges: Procedure Code Group Overview

0092-DURA-MATER-DRAINAGE

ICD-10-PCS Code For Dura Mater: Procedure Code Group Overview

0093-EPIDURAL-SPACE-INTRACRANIAL-DRAINAGE

ICD-10-PCS Code For Epidural Space, Intracranial: Procedure Code Group Overview

0095-SUBARACHNOID-SPACE-DRAINAGE

ICD-10-PCS Code For Subarachnoid Space, Intracranial: Procedure Code Group Overview

0096-CEREBRAL-VENTRICLE-DRAINAGE

ICD-10-PCS Code For Cerebral Ventricle: Procedure Code Group Overview

0097-CEREBRAL-HEMISPHERE-DRAINAGE

ICD-10-PCS Code For Cerebral Hemisphere: Procedure Code Group Overview

0098-BASAL-GANGLIA-DRAINAGE

ICD-10-PCS Code For Basal Ganglia: Procedure Code Group Overview

0099-THALAMUS-DRAINAGE

ICD-10-PCS Code For Thalamus: Procedure Code Group Overview

009A-HYPOTHALAMUS-DRAINAGE

ICD-10-PCS Code For Hypothalamus: Procedure Code Group Overview

Showing 1–10 of 30

Frequently Asked Questions

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.

Published by

Trek Health powers OpenPayer with a leading commercial payer intelligence platform, seamlessly converting fragmented payer data into actionable insights for provider organizations.

Trek Health ingests and normalizes Transparency in Coverage data and payer policy updates to give provider organizations a clear view of how commercial reimbursement behaves across markets, payers, and services. Our platform transforms raw payer disclosures into structured intelligence that supports contract evaluation, payer negotiations, and service line strategy. By combining market benchmarks with ongoing policy visibility, Trek helps teams identify variability, risk, and opportunity in commercial reimbursement. The result is faster insight, stronger negotiating positions, and more informed financial decisions.

Explore openpayer tools

View all tools

When to Use

ICD-10-PCS Codes

9 rows

ICD-10-PCS Code	Description
009400Z	Drainage of Intracranial Subdural Space with Drainage Device, Open Approach
00940ZX	Drainage of Intracranial Subdural Space, Open Approach, Diagnostic
00940ZZ	Drainage of Intracranial Subdural Space, Open Approach
009430Z	Drainage of Intracranial Subdural Space with Drainage Device, Percutaneous Approach
00943ZX	Drainage of Intracranial Subdural Space, Percutaneous Approach, Diagnostic
00943ZZ	Drainage of Intracranial Subdural Space, Percutaneous Approach
009440Z	Drainage of Intracranial Subdural Space with Drainage Device, Percutaneous Endoscopic Approach
00944ZX	Drainage of Intracranial Subdural Space, Percutaneous Endoscopic Approach, Diagnostic
00944ZZ	Drainage of Intracranial Subdural Space, Percutaneous Endoscopic Approach

DRG Codes

15 rows

DRG Code	Description
023	Craniotomy with Major Device Implant or Acute Complex CNS Principal Diagnosis with MCC or Antineoplastic Implant or Epilepsy with Neurostimulator
024	Craniotomy with Major Device Implant or Acute Complex CNS Principal Diagnosis without MCC
025	Craniotomy and Endovascular Intracranial Procedures with MCC
026	Craniotomy and Endovascular Intracranial Procedures with CC
027	Craniotomy and Endovascular Intracranial Procedures without CC/MCC
820	Lymphoma and Leukemia with Major O.R. Procedures with MCC
821	Lymphoma and Leukemia with Major O.R. Procedures with CC
822	Lymphoma and Leukemia with Major O.R. Procedures without CC/MCC
826	Myeloproliferative Disorders or Poorly Differentiated Neoplasms with Major O.R. Procedures with MCC
827	Myeloproliferative Disorders or Poorly Differentiated Neoplasms with Major O.R. Procedures with CC

Showing 1–10 of 15

Typical Clinical Scenarios

An elderly patient presents to the emergency department after a fall with progressive unilateral weakness and decreasing level of consciousness. CT scan reveals a large acute subdural hematoma causing significant mass effect and midline shift; neurosurgery performs an open craniotomy to evacuate the hematoma and places a subdural drain to continue postoperative drainage. A drainage code that reflects an open approach with placement of a drainage device is appropriate to document the evacuation and drain insertion. Typical codes: 009400Z
A middle-aged patient with a history of chronic subdural hygroma experiences gradual cognitive decline and headaches over weeks; imaging shows a chronic subdural fluid collection amenable to percutaneous burr hole drainage. Neurosurgery schedules a planned percutaneous bedside or operating room drainage to evacuate the subdural fluid and may leave a catheter for temporary drainage. A percutaneous approach code that includes use of a drainage device best represents this elective drainage procedure. Typical codes: 009430Z
A postoperative patient who previously had a subdural drain develops recurrent collection and signs of persistent mass effect; a surgeon returns to the operating room to explore and re-evacuate the subdural space but does not place a new drain, performing diagnostic exploration and evacuation only. This scenario is coded to reflect an open diagnostic drainage procedure without placement of a drainage device. Typical codes: 00940ZX

Related Codes

0090-BRAIN-DRAINAGE

ICD-10-PCS Code For Brain: Procedure Code Group Overview

0091-CEREBRAL-MENINGES-TAKING-OR-LETTING-OUT-FLUIDS-CEREBRAL-MENINGES

ICD-10-PCS Code For Cerebral Meninges: Procedure Code Group Overview

0092-DURA-MATER-DRAINAGE

ICD-10-PCS Code For Dura Mater: Procedure Code Group Overview

0093-EPIDURAL-SPACE-INTRACRANIAL-DRAINAGE

ICD-10-PCS Code For Epidural Space, Intracranial: Procedure Code Group Overview

0095-SUBARACHNOID-SPACE-DRAINAGE

ICD-10-PCS Code For Subarachnoid Space, Intracranial: Procedure Code Group Overview

0096-CEREBRAL-VENTRICLE-DRAINAGE

ICD-10-PCS Code For Cerebral Ventricle: Procedure Code Group Overview

0097-CEREBRAL-HEMISPHERE-DRAINAGE

ICD-10-PCS Code For Cerebral Hemisphere: Procedure Code Group Overview

0098-BASAL-GANGLIA-DRAINAGE

ICD-10-PCS Code For Basal Ganglia: Procedure Code Group Overview

0099-THALAMUS-DRAINAGE

ICD-10-PCS Code For Thalamus: Procedure Code Group Overview

009A-HYPOTHALAMUS-DRAINAGE

ICD-10-PCS Code For Hypothalamus: Procedure Code Group Overview

Showing 1–10 of 30

Frequently Asked Questions

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.

Published by

Trek Health powers OpenPayer with a leading commercial payer intelligence platform, seamlessly converting fragmented payer data into actionable insights for provider organizations.

ICD-10-PCS Code For Subdural Space: Procedure Code Group Overview

Sign up for ICD-10-PCS Code For Subdural Space: Procedure Code Group Overview policy alerts

Subdural Space Drainage Procedure Overview

Code Attributes

ICD-10-PCS Code For Subdural Space: Procedure Code Group Overview

Sign up for ICD-10-PCS Code For Subdural Space: Procedure Code Group Overview policy alerts

Subdural Space Drainage Procedure Overview

Code Attributes

When to Use

ICD-10-PCS Codes

DRG Codes

Typical Clinical Scenarios

Related Codes

Which procedures are included in ICD-10-PCS code group 0094?

What is the primary purpose of procedures coded in 0094?

What ICD-10-PCS attributes describe the 0094 code group?

How does accurate coding within 0094 impact billing and reimbursement?

Which DRGs are related to procedures in the 0094 code group?

References

When to Use

ICD-10-PCS Codes

DRG Codes

Typical Clinical Scenarios

Related Codes

Which procedures are included in ICD-10-PCS code group 0094?

What is the primary purpose of procedures coded in 0094?

What ICD-10-PCS attributes describe the 0094 code group?

How does accurate coding within 0094 impact billing and reimbursement?

Which DRGs are related to procedures in the 0094 code group?

References