DDY58ZZHyperthermia of Colon

Radiation Therapy›Gastrointestinal System›Other Radiation

Billable / Specific Code

ICD-10-PCS DDY58ZZ

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

DDY58ZZ is a billable ICD-10-PCS procedure code for Hyperthermia of Colon. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026).

Code Identity

ICD-10-PCS Code

DDY58ZZ

Billable Status

Yes — Valid for Submission

Code Describes

Hyperthermia of Colon

Parent Code

DDY

Short Description

Hyperthermia of Colon

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	D	Gastrointestinal System
3	Modality	Y	Other Radiation
4	TreatmentSite	5	Colon
5	ModalityQualifier	8	Hyperthermia
6	Isotope	Z	None
7	Qualifier	Z	None

Convert to ICD-9-PCS

Closest ICD-9-PCS equivalents for DDY58ZZ under the General Equivalence Mappings.

99.85

Approximate match.

Similar Procedure Codes

Questions About DDY58ZZ

Is DDY58ZZ a billable code?

Yes. DDY58ZZ is a complete seven-character ICD-10-PCS code, specific enough to report Hyperthermia of Colon on inpatient claims from October 1, 2025 through September 30, 2026.

What do the characters in DDY58ZZ mean?

DDY58ZZ breaks down character by character: the 1st character D is the Section (Radiation Therapy); the 2nd character D is the Body System (Gastrointestinal System); the 3rd character Y is the Modality (Other Radiation); the 4th character 5 is the TreatmentSite (Colon); 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 DDY58ZZ?

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