D9YD8ZZHyperthermia of Nasopharynx
- Billable / Specific Code
D9YD8ZZ is a billable ICD-10-PCS procedure code for Hyperthermia of Nasopharynx. 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 Radiation therapy, NEC.
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 | Y | Other Radiation |
| 4 | TreatmentSite | D | Nasopharynx |
| 5 | ModalityQualifier | 8 | Hyperthermia |
| 6 | Isotope | Z | None |
| 7 | Qualifier | Z | None |
In the ICD-10-PCS Alphabetic Index
These FY 2026 ICD-10-PCS Alphabetic Index entries lead to D9YD8ZZ:
Clinical Classification (CCSR)
AHRQ groups D9YD8ZZ into these clinical categories.
Convert to ICD-9-PCS
Closest ICD-9-PCS equivalents for D9YD8ZZ under the General Equivalence Mappings.
Similar Procedure Codes
Questions About D9YD8ZZ
Is D9YD8ZZ a billable code?
Yes. D9YD8ZZ is a complete seven-character ICD-10-PCS code, specific enough to report Hyperthermia of Nasopharynx on inpatient claims from October 1, 2025 through September 30, 2026.
What do the characters in D9YD8ZZ mean?
D9YD8ZZ 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 Y is the Modality (Other Radiation); the 4th character D is the TreatmentSite (Nasopharynx); 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 D9YD8ZZ?
Under the General Equivalence Mappings, Hyperthermia of Nasopharynx crosswalks to ICD-9-PCS 99.85. The mapping is approximate, so confirm it fits the documentation.
