D91BB6ZLow Dose Rate (LDR) Brachytherapy of Larynx using Cesium 131 (Cs-131)
- Billable / Specific Code
D91BB6Z is a billable ICD-10-PCS procedure code for Low Dose Rate (LDR) Brachytherapy of Larynx 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
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 | 9 | Ear, Nose, Mouth and Throat |
| 3 | Modality | 1 | Brachytherapy |
| 4 | TreatmentSite | B | Larynx |
| 5 | ModalityQualifier | B | Low Dose Rate (LDR) |
| 6 | Isotope | 6 | Cesium 131 (Cs-131) |
| 7 | Qualifier | Z | None |
In the ICD-10-PCS Alphabetic Index
These FY 2026 ICD-10-PCS Alphabetic Index entries lead to D91BB6Z:
Clinical Classification (CCSR)
AHRQ groups D91BB6Z into these clinical categories.
Code History
- D91BBYZ — LDR Brachytherapy of Larynx using Oth Isotope
Similar Procedure Codes
Questions About D91BB6Z
Is D91BB6Z a billable code?
Yes. D91BB6Z is a complete seven-character ICD-10-PCS code, specific enough to report Low Dose Rate (LDR) Brachytherapy of Larynx using Cesium 131 (Cs-131) on inpatient claims from October 1, 2025 through September 30, 2026.
What do the characters in D91BB6Z mean?
D91BB6Z breaks down character by character: the 1st character D is the Section (Radiation Therapy); the 2nd character 9 is the Body System (Ear, Nose, Mouth and Throat); the 3rd character 1 is the Modality (Brachytherapy); the 4th character B is the TreatmentSite (Larynx); 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).
