00RM4KZReplacement of Facial Nerve with Nonautologous Tissue Substitute, Percutaneous Endoscopic Approach
- Billable / Specific Code
00RM4KZ is a billable ICD-10-PCS procedure code for Replacement of Facial Nerve with Nonautologous Tissue Substitute, Percutaneous Endoscopic Approach. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to 12 MS-DRGs. The root operation Replacement involves putting in or on biological or synthetic material that physically takes the place and/or function of all or a portion of 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 | 0 | Central Nervous System and Cranial Nerves |
| 3 | Operation | R | Replacement |
| 4 | BodyPart | M | Facial Nerve |
| 5 | Approach | 4 | Percutaneous Endoscopic |
| 6 | Device | K | Nonautologous Tissue Substitute |
| 7 | Qualifier | Z | No Qualifier |
Convert to ICD-9-PCS
Closest ICD-9-PCS equivalents for 00RM4KZ under the General Equivalence Mappings.
Code History
- 00QM4ZZ — Repair Facial Nerve, Percutaneous Endoscopic Approach
Similar Procedure Codes
Questions About 00RM4KZ
Is 00RM4KZ a billable code?
Yes. 00RM4KZ is a complete seven-character ICD-10-PCS code, specific enough to report Replacement of Facial Nerve with Nonautologous Tissue Substitute, Percutaneous Endoscopic Approach on inpatient claims from October 1, 2025 through September 30, 2026.
What do the characters in 00RM4KZ mean?
00RM4KZ 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 R is the Operation (Replacement); the 4th character M is the BodyPart (Facial Nerve); the 5th character 4 is the Approach (Percutaneous Endoscopic); the 6th character K is the Device (Nonautologous Tissue Substitute); the 7th character Z is the Qualifier (No Qualifier).
What MS-DRG does 00RM4KZ group to?
On an inpatient stay, Replacement of Facial Nerve with Nonautologous Tissue Substitute, Percutaneous Endoscopic Approach maps to MS-DRGs 040, 041, 042, 143, 144, 145, 907, 908, 909, 957, 958, 959, with relative weights from 1.2023 to 7.6199. The MS-DRG sets the fixed Medicare payment for the stay.
What is the ICD-9-PCS equivalent of 00RM4KZ?
Under the General Equivalence Mappings, Replacement of Facial Nerve with Nonautologous Tissue Substitute, Percutaneous Endoscopic Approach crosswalks to ICD-9-PCS 45. The mapping is approximate, so confirm it fits the documentation.
