D01099ZHigh Dose Rate (HDR) Brachytherapy of Brain using Iodine 125 (I-125)
- Billable / Specific Code
D01099Z is a billable ICD-10-PCS procedure code for High Dose Rate (HDR) Brachytherapy of Brain using Iodine 125 (I-125). It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027). 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 | 0 | Central and Peripheral Nervous System |
| 3 | Modality | 1 | Brachytherapy |
| 4 | TreatmentSite | 0 | Brain |
| 5 | ModalityQualifier | 9 | High Dose Rate (HDR) |
| 6 | Isotope | 9 | Iodine 125 (I-125) |
| 7 | Qualifier | Z | None |
In the ICD-10-PCS Alphabetic Index
These FY 2027 ICD-10-PCS Alphabetic Index entries lead to this code:
To code brachytherapy of the brain, open the FY 2027 ICD-10-PCS Alphabetic Index at Brachytherapy, then the subterm Brain. The index leads to table D01, where the modality qualifier, isotope and qualifier values shown in the breakdown above complete the seven-character code D01099Z.
Clinical Classification (CCSR)
AHRQ groups this procedure code into these clinical categories.
Convert to ICD-9-PCS
Closest ICD-9-PCS equivalents for this code under the General Equivalence Mappings.
Similar Procedure Codes
Questions About D01099Z
Is D01099Z a billable code?
Yes. This is a complete seven-character ICD-10-PCS code, specific enough to report High Dose Rate (HDR) Brachytherapy of Brain using Iodine 125 (I-125) on inpatient claims from October 1, 2026 through September 30, 2027.
What do the characters in D01099Z mean?
The code breaks down character by character: the 1st character D is the Section (Radiation Therapy); the 2nd character 0 is the Body System (Central and Peripheral Nervous System); the 3rd character 1 is the Modality (Brachytherapy); the 4th character 0 is the TreatmentSite (Brain); the 5th character 9 is the ModalityQualifier (High Dose Rate (HDR)); the 6th character 9 is the Isotope (Iodine 125 (I-125)); the 7th character Z is the Qualifier (None).
What is the ICD-9-PCS equivalent of D01099Z?
Under the General Equivalence Mappings, High Dose Rate (HDR) Brachytherapy of Brain using Iodine 125 (I-125) crosswalks to ICD-9-PCS 92.23 (Radioisotopic teleradiotherapy). The mapping is approximate, so confirm it fits the documentation.
