D7Y18ZZHyperthermia of Thymus
- Billable / Specific Code
D7Y18ZZ is a billable ICD-10-PCS procedure code for Hyperthermia of Thymus. 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 | 7 | Lymphatic and Hematologic System |
| 3 | Modality | Y | Other Radiation |
| 4 | TreatmentSite | 1 | Thymus |
| 5 | ModalityQualifier | 8 | Hyperthermia |
| 6 | Isotope | Z | None |
| 7 | Qualifier | Z | None |
Convert to ICD-9-PCS
Closest ICD-9-PCS equivalents for D7Y18ZZ under the General Equivalence Mappings.
Similar Procedure Codes
Questions About D7Y18ZZ
Is D7Y18ZZ a billable code?
Yes. D7Y18ZZ is a complete seven-character ICD-10-PCS code, specific enough to report Hyperthermia of Thymus on inpatient claims from October 1, 2025 through September 30, 2026.
What do the characters in D7Y18ZZ mean?
D7Y18ZZ breaks down character by character: the 1st character D is the Section (Radiation Therapy); the 2nd character 7 is the Body System (Lymphatic and Hematologic System); the 3rd character Y is the Modality (Other Radiation); the 4th character 1 is the TreatmentSite (Thymus); the 5th character 8 is the ModalityQualifier (Hyperthermia); the 6th character Z is the Isotope (None); the 7th character Z is the Qualifier (None).
What is the ICD-9-PCS equivalent of D7Y18ZZ?
Under the General Equivalence Mappings, Hyperthermia of Thymus crosswalks to ICD-9-PCS 99.85. The mapping is approximate, so confirm it fits the documentation.
