D9Y88ZZHyperthermia of Hard Palate

Q: What is the ICD-10-PCS code for hyperthermia of the hard palate radiation therapy?

The FY 2027 ICD-10-PCS Alphabetic Index entry Hyperthermia, Radiation Therapy, Palate, Hard is a direct entry for D9Y88ZZ, Hyperthermia of Hard Palate, billable on inpatient claims from October 1, 2026 through September 30, 2027.

Radiation Therapy›Ear, Nose, Mouth and Throat›Other Radiation

Billable / Specific Code

ICD-10-PCS D9Y88ZZ

CMS Source: FY 2027 ICD-10-PCS dataset. Effective Oct 1, 2026 – Sep 30, 2027.

D9Y88ZZ is a billable ICD-10-PCS procedure code for Hyperthermia of Hard Palate. 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

ICD-10-PCS Code

D9Y88ZZ

Billable Status

Yes — Valid for Submission

Code Describes

Hyperthermia of Hard Palate

Short Description

Hyperthermia of Hard Palate

Same as the full description in the CMS dataset.

Parent Code

D9Y

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	8	Hard Palate
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:

Hyperthermia, Radiation Therapy, Palate, Hard

Direct entry for this code

To code hyperthermia of the hard palate radiation therapy, open the FY 2027 ICD-10-PCS Alphabetic Index at Hyperthermia, then the subterms Radiation Therapy, Palate, Hard. The entry lists D9Y88ZZ directly as a complete, billable code.

Browse the full ICD-10-PCS Alphabetic Index →

Clinical Classification (CCSR)

AHRQ groups this procedure code into these clinical categories.

RAD004

Radiation therapy, NEC

Clinical domain: Radiation Therapy

Convert to ICD-9-PCS

Closest ICD-9-PCS equivalents for this code under the General Equivalence Mappings.

99.85

Hyperthermia for treatment of cancer

Approximate match.

Similar Procedure Codes

Questions About D9Y88ZZ

Is D9Y88ZZ a billable code?

Yes. This is a complete seven-character ICD-10-PCS code, specific enough to report Hyperthermia of Hard Palate on inpatient claims from October 1, 2026 through September 30, 2027.

What is the ICD-10-PCS code for hyperthermia of the hard palate radiation therapy?

The FY 2027 ICD-10-PCS Alphabetic Index entry Hyperthermia, Radiation Therapy, Palate, Hard is a direct entry for D9Y88ZZ, Hyperthermia of Hard Palate, billable on inpatient claims from October 1, 2026 through September 30, 2027.

What do the characters in D9Y88ZZ 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 8 is the TreatmentSite (Hard Palate); 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 D9Y88ZZ?

Under the General Equivalence Mappings, Hyperthermia of Hard Palate crosswalks to ICD-9-PCS 99.85 (Hyperthermia for treatment of cancer). The mapping is approximate, so confirm it fits the documentation.