00950ZZDrainage of Intracranial Subarachnoid Space, Open Approach
- Billable / Specific Code
00950ZZ is a billable ICD-10-PCS procedure code for Drainage of Intracranial Subarachnoid Space, Open Approach. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to 15 MS-DRGs. The root operation Drainage involves taking or letting out fluids and/or gases from a body part. In AHRQ's Clinical Classifications Software (CCSR), this procedure falls under Other CNS drainage and related procedures.
Code Identity
PCS Table Breakdown
Each ICD-10-PCS code is built from seven characters, each an axis of the procedure. Hover or tap the icons for the official CMS definitions.
| Position | Designation | Value | Meaning |
|---|---|---|---|
| 1 | Section | 0 | Medical and Surgical |
| 2 | Body System | 0 | Central Nervous System and Cranial Nerves |
| 3 | Operation | 9 | Drainage |
| 4 | BodyPart | 5 | Subarachnoid Space, Intracranial |
| 5 | Approach | 0 | Open |
| 6 | Device | Z | No Device |
| 7 | Qualifier | Z | No Qualifier |
In the ICD-10-PCS Alphabetic Index
These FY 2027 ICD-10-PCS Alphabetic Index entries lead to this code:
To code drainage of the intracranial subarachnoid space, open the FY 2027 ICD-10-PCS Alphabetic Index at Drainage, then the subterms Subarachnoid Space, Intracranial. The index leads to table 009, where the approach, device and qualifier values shown in the breakdown above complete the seven-character code 00950ZZ.
Clinical Classification (CCSR)
AHRQ groups this procedure code into these clinical categories.
Convert to ICD-9-PCS
Closest ICD-9-PCS equivalents for this code under the General Equivalence Mappings.
Similar Procedure Codes
Questions About 00950ZZ
Is 00950ZZ a billable code?
Yes. This is a complete seven-character ICD-10-PCS code, specific enough to report Drainage of Intracranial Subarachnoid Space, Open Approach on inpatient claims from October 1, 2026 through September 30, 2027.
What do the characters in 00950ZZ mean?
The code breaks down character by character: the 1st character 0 is the Section (Medical and Surgical); the 2nd character 0 is the Body System (Central Nervous System and Cranial Nerves); the 3rd character 9 is the Operation (Drainage); the 4th character 5 is the BodyPart (Subarachnoid Space, Intracranial); the 5th character 0 is the Approach (Open); the 6th character Z is the Device (No Device); the 7th character Z is the Qualifier (No Qualifier).
What MS-DRG does 00950ZZ group to?
On an inpatient stay, Drainage of Intracranial Subarachnoid Space, Open Approach maps to MS-DRGs 023, 024, 025, 026, 027, 820, 821, 822, 826, 827, 828, 907, 908, 909, 955, with relative weights from 1.1267 to 6.5257. The MS-DRG sets the fixed Medicare payment for the stay.
What is the ICD-9-PCS equivalent of 00950ZZ?
Under the General Equivalence Mappings, Drainage of Intracranial Subarachnoid Space, Open Approach crosswalks to ICD-9-PCS 01.31 (Incision of cerebral meninges). The mapping is approximate, so confirm it fits the documentation.
