DW11B6ZLow Dose Rate (LDR) Brachytherapy of Head and Neck using Cesium 131 (Cs-131)

Radiation Therapy›Anatomical Regions›Brachytherapy

Billable / Specific Code

ICD-10-PCS DW11B6Z

CMS Source: FY 2026 ICD-10-PCS dataset. Effective Oct 1, 2025 – Sep 30, 2026.

DW11B6Z is a billable ICD-10-PCS procedure code for Low Dose Rate (LDR) Brachytherapy of Head and Neck using Cesium 131 (Cs-131). It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). In AHRQ's Clinical Classifications Software (CCSR), this procedure falls under Brachytherapy.

Code Identity

ICD-10-PCS Code

DW11B6Z

Billable Status

Yes — Valid for Submission

Code Describes

Low Dose Rate (LDR) Brachytherapy of Head and Neck using Cesium 131 (Cs-131)

Short Description

LDR Brachytherapy of Head & Neck using Cesium 131

Parent Code

DW1

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	D	Radiation Therapy
2	Body System	W	Anatomical Regions
3	Modality	1	Brachytherapy
4	TreatmentSite	1	Head and Neck
5	ModalityQualifier	B	Low Dose Rate (LDR)
6	Isotope	6	Cesium 131 (Cs-131)
7	Qualifier	Z	None

Clinical Classification (CCSR)

AHRQ groups DW11B6Z into these clinical categories.

RAD002

Brachytherapy

Clinical domain: Radiation Therapy

Code History

Replaces previously assigned code(s):

DW11BYZ — LDR Brachytherapy of Head & Neck using Oth Isotope

Similar Procedure Codes

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Questions About DW11B6Z

Is DW11B6Z a billable code?

Yes. DW11B6Z is a complete seven-character ICD-10-PCS code, specific enough to report Low Dose Rate (LDR) Brachytherapy of Head and Neck using Cesium 131 (Cs-131) on inpatient claims from October 1, 2025 through September 30, 2026.

What do the characters in DW11B6Z mean?

DW11B6Z breaks down character by character: the 1st character D is the Section (Radiation Therapy); the 2nd character W is the Body System (Anatomical Regions); the 3rd character 1 is the Modality (Brachytherapy); the 4th character 1 is the TreatmentSite (Head and Neck); the 5th character B is the ModalityQualifier (Low Dose Rate (LDR)); the 6th character 6 is the Isotope (Cesium 131 (Cs-131)); the 7th character Z is the Qualifier (None).