D91BBYZLow Dose Rate (LDR) Brachytherapy of Larynx using Other Isotope
- Billable / Specific Code
D91BBYZ is a billable ICD-10-PCS procedure code for Low Dose Rate (LDR) Brachytherapy of Larynx using Other Isotope. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026).
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 | Y | Other Isotope |
| 7 | Qualifier | Z | None |
Convert to ICD-9-PCS
Closest ICD-9-PCS equivalents for D91BBYZ under the General Equivalence Mappings.
Code History
- D91BB6Z — Low Dose Rate (LDR) Brachytherapy of Larynx using Cesium 131
Similar Procedure Codes
Questions About D91BBYZ
Is D91BBYZ a billable code?
Yes. D91BBYZ is a complete seven-character ICD-10-PCS code, specific enough to report Low Dose Rate (LDR) Brachytherapy of Larynx using Other Isotope on inpatient claims from October 1, 2025 through September 30, 2026.
What do the characters in D91BBYZ mean?
D91BBYZ 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 Y is the Isotope (Other Isotope); the 7th character Z is the Qualifier (None).
What is the ICD-9-PCS equivalent of D91BBYZ?
Under the General Equivalence Mappings, Low Dose Rate (LDR) Brachytherapy of Larynx using Other Isotope crosswalks to ICD-9-PCS 92.23. The mapping is approximate, so confirm it fits the documentation.
