DG1599ZHigh Dose Rate (HDR) Brachytherapy of Thyroid using Iodine 125 (I-125)
- Billable / Specific Code
DG1599Z is a billable ICD-10-PCS procedure code for High Dose Rate (HDR) Brachytherapy of Thyroid 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 | G | Endocrine System |
| 3 | Modality | 1 | Brachytherapy |
| 4 | TreatmentSite | 5 | Thyroid |
| 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 thyroid gland, open the FY 2027 ICD-10-PCS Alphabetic Index at Brachytherapy, then the subterms Gland, Thyroid. The index leads to table DG1, where the modality qualifier, isotope and qualifier values shown in the breakdown above complete the seven-character code DG1599Z.
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 DG1599Z
Is DG1599Z a billable code?
Yes. This is a complete seven-character ICD-10-PCS code, specific enough to report High Dose Rate (HDR) Brachytherapy of Thyroid using Iodine 125 (I-125) on inpatient claims from October 1, 2026 through September 30, 2027.
What do the characters in DG1599Z mean?
The code breaks down character by character: the 1st character D is the Section (Radiation Therapy); the 2nd character G is the Body System (Endocrine System); the 3rd character 1 is the Modality (Brachytherapy); the 4th character 5 is the TreatmentSite (Thyroid); 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 DG1599Z?
Under the General Equivalence Mappings, High Dose Rate (HDR) Brachytherapy of Thyroid using Iodine 125 (I-125) crosswalks to ICD-9-PCS 92.23 (Radioisotopic teleradiotherapy). The mapping is approximate, so confirm it fits the documentation.
