0W9100ZDrainage of Cranial Cavity with Drainage Device, Open Approach
- Billable / Specific Code
0W9100Z is a billable ICD-10-PCS procedure code for Drainage of Cranial Cavity with Drainage Device, Open Approach. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to 17 MS-DRGs. The root operation Drainage involves taking or letting out fluids and/or gases from a body part.
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 | W | Anatomical Regions, General |
| 3 | Operation | 9 | Drainage |
| 4 | BodyPart | 1 | Cranial Cavity |
| 5 | Approach | 0 | Open |
| 6 | Device | 0 | Drainage Device |
| 7 | Qualifier | Z | No Qualifier |
Convert to ICD-9-PCS
Closest ICD-9-PCS equivalents for 0W9100Z under the General Equivalence Mappings.
Similar Procedure Codes
Questions About 0W9100Z
Is 0W9100Z a billable code?
Yes. 0W9100Z is a complete seven-character ICD-10-PCS code, specific enough to report Drainage of Cranial Cavity with Drainage Device, Open Approach on inpatient claims from October 1, 2025 through September 30, 2026.
What do the characters in 0W9100Z mean?
0W9100Z breaks down character by character: the 1st character 0 is the Section (Medical and Surgical); the 2nd character W is the Body System (Anatomical Regions, General); the 3rd character 9 is the Operation (Drainage); the 4th character 1 is the BodyPart (Cranial Cavity); the 5th character 0 is the Approach (Open); the 6th character 0 is the Device (Drainage Device); the 7th character Z is the Qualifier (No Qualifier).
What MS-DRG does 0W9100Z group to?
On an inpatient stay, Drainage of Cranial Cavity with Drainage Device, Open Approach maps to MS-DRGs 023, 024, 025, 026, 027, 140, 141, 142, 820, 821, 822, 826, 827, 828, 907, 908, 909, with relative weights from 1.2040 to 5.8648. The MS-DRG sets the fixed Medicare payment for the stay.
What is the ICD-9-PCS equivalent of 0W9100Z?
Under the General Equivalence Mappings, Drainage of Cranial Cavity with Drainage Device, Open Approach crosswalks to ICD-9-PCS 12.4. The mapping is approximate, so confirm it fits the documentation.
