09BC4ZXExcision of Left Mastoid Sinus, Percutaneous Endoscopic Approach, Diagnostic

Medical and Surgical›Ear, Nose, Sinus›Excision
  • Billable / Specific Code
ICD-10-PCS 09BC4ZX
CMS Source: FY 2026 ICD-10-PCS dataset. Effective Oct 1, 2025 – Sep 30, 2026.FacebookXLinkedInPrint

09BC4ZX is a billable ICD-10-PCS procedure code for Excision of Left Mastoid Sinus, Percutaneous Endoscopic Approach, Diagnostic. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRGs 143, 144, 145. The root operation Excision involves cutting out or off, without replacement, a portion of a body part.

Code Identity

ICD-10-PCS Code
09BC4ZX
Billable Status
Yes — Valid for Submission
Code Describes
Excision of Left Mastoid Sinus, Percutaneous Endoscopic Approach, Diagnostic
Parent Code
09B
Short Description
Excision of Left Mastoid Sinus, Perc Endo Approach, Diagn

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.

PositionDesignationValueMeaning
1Section0Medical and Surgical
2Body System9Ear, Nose, Sinus
3OperationBExcision
4BodyPartCMastoid Sinus, Left
5Approach4Percutaneous Endoscopic
6DeviceZNo Device
7QualifierXDiagnostic

Convert to ICD-9-PCS

Closest ICD-9-PCS equivalents for 09BC4ZX under the General Equivalence Mappings.

20.32
Approximate match.

Code History

Replaced in the FY 2026 code set by:
  • 09BC8ZX — Excision of Left Mastoid Sinus, Endo, Diagn

Similar Procedure Codes

Questions About 09BC4ZX

Is 09BC4ZX a billable code?

Yes. 09BC4ZX is a complete seven-character ICD-10-PCS code, specific enough to report Excision of Left Mastoid Sinus, Percutaneous Endoscopic Approach, Diagnostic on inpatient claims from October 1, 2025 through September 30, 2026.

What do the characters in 09BC4ZX mean?

09BC4ZX breaks down character by character: the 1st character 0 is the Section (Medical and Surgical); the 2nd character 9 is the Body System (Ear, Nose, Sinus); the 3rd character B is the Operation (Excision); the 4th character C is the BodyPart (Mastoid Sinus, Left); the 5th character 4 is the Approach (Percutaneous Endoscopic); the 6th character Z is the Device (No Device); the 7th character X is the Qualifier (Diagnostic).

What MS-DRG does 09BC4ZX group to?

On an inpatient stay, Excision of Left Mastoid Sinus, Percutaneous Endoscopic Approach, Diagnostic maps to MS-DRGs 143, 144, 145, with relative weights from 1.2023 to 3.7466. The MS-DRG sets the fixed Medicare payment for the stay.

What is the ICD-9-PCS equivalent of 09BC4ZX?

Under the General Equivalence Mappings, Excision of Left Mastoid Sinus, Percutaneous Endoscopic Approach, Diagnostic crosswalks to ICD-9-PCS 20.32. The mapping is approximate, so confirm it fits the documentation.