D9Y78ZZHyperthermia of Sinuses
- Billable / Specific Code
D9Y78ZZ is a billable ICD-10-PCS procedure code for Hyperthermia of Sinuses. 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 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 | 7 | Sinuses |
| 5 | ModalityQualifier | 8 | Hyperthermia |
| 6 | Isotope | Z | None |
| 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 hyperthermia of the sinuses radiation therapy, open the FY 2027 ICD-10-PCS Alphabetic Index at Hyperthermia, then the subterms Radiation Therapy, Sinuses. The entry lists D9Y78ZZ directly as a complete, billable code.
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 D9Y78ZZ
Is D9Y78ZZ a billable code?
Yes. This is a complete seven-character ICD-10-PCS code, specific enough to report Hyperthermia of Sinuses on inpatient claims from October 1, 2026 through September 30, 2027.
What is the ICD-10-PCS code for hyperthermia of the sinuses radiation therapy?
The FY 2027 ICD-10-PCS Alphabetic Index entry Hyperthermia, Radiation Therapy, Sinuses is a direct entry for D9Y78ZZ, Hyperthermia of Sinuses, billable on inpatient claims from October 1, 2026 through September 30, 2027.
What do the characters in D9Y78ZZ mean?
The code 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 7 is the TreatmentSite (Sinuses); 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 D9Y78ZZ?
Under the General Equivalence Mappings, Hyperthermia of Sinuses crosswalks to ICD-9-PCS 99.85 (Hyperthermia for treatment of cancer). The mapping is approximate, so confirm it fits the documentation.
