D9Y18ZZHyperthermia of Nose

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

Billable / Specific Code

ICD-10-PCS D9Y18ZZ

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

D9Y18ZZ is a billable ICD-10-PCS procedure code for Hyperthermia of Nose. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026).

Code Identity

ICD-10-PCS Code

D9Y18ZZ

Billable Status

Yes — Valid for Submission

Code Describes

Hyperthermia of Nose

Parent Code

D9Y

Short Description

Hyperthermia of Nose

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	1	Nose
5	ModalityQualifier	8	Hyperthermia
6	Isotope	Z	None
7	Qualifier	Z	None

Convert to ICD-9-PCS

Closest ICD-9-PCS equivalents for D9Y18ZZ under the General Equivalence Mappings.

99.85

Approximate match.

Similar Procedure Codes

Questions About D9Y18ZZ

Is D9Y18ZZ a billable code?

Yes. D9Y18ZZ is a complete seven-character ICD-10-PCS code, specific enough to report Hyperthermia of Nose on inpatient claims from October 1, 2025 through September 30, 2026.

What do the characters in D9Y18ZZ mean?

D9Y18ZZ 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 1 is the TreatmentSite (Nose); 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 D9Y18ZZ?

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