D9YB8ZZHyperthermia of Larynx

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

Billable / Specific Code

ICD-10-PCS D9YB8ZZ

CMS Source: FY 2026 ICD-10-PCS dataset. Effective Oct 1, 2025 – Sep 30, 2026.

D9YB8ZZ is a billable ICD-10-PCS procedure code for Hyperthermia of Larynx. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026).

Code Identity

ICD-10-PCS Code

D9YB8ZZ

Billable Status

Yes — Valid for Submission

Code Describes

Hyperthermia of Larynx

Parent Code

D9Y

Short Description

Hyperthermia of Larynx

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	B	Larynx
5	ModalityQualifier	8	Hyperthermia
6	Isotope	Z	None
7	Qualifier	Z	None

Convert to ICD-9-PCS

Closest ICD-9-PCS equivalents for D9YB8ZZ under the General Equivalence Mappings.

99.85

Approximate match.

Similar Procedure Codes

Questions About D9YB8ZZ

Is D9YB8ZZ a billable code?

Yes. D9YB8ZZ is a complete seven-character ICD-10-PCS code, specific enough to report Hyperthermia of Larynx on inpatient claims from October 1, 2025 through September 30, 2026.

What do the characters in D9YB8ZZ mean?

D9YB8ZZ 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 B is the TreatmentSite (Larynx); 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 D9YB8ZZ?

Under the General Equivalence Mappings, Hyperthermia of Larynx crosswalks to ICD-9-PCS 99.85. The mapping is approximate, so confirm it fits the documentation.