D91FB6ZLow Dose Rate (LDR) Brachytherapy of Oropharynx using Cesium 131 (Cs-131)

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

Billable / Specific Code

ICD-10-PCS D91FB6Z

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

D91FB6Z is a billable ICD-10-PCS procedure code for Low Dose Rate (LDR) Brachytherapy of Oropharynx using Cesium 131 (Cs-131). 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 Brachytherapy.

Code Identity

ICD-10-PCS Code

D91FB6Z

Billable Status

Yes — Valid for Submission

Code Describes

Low Dose Rate (LDR) Brachytherapy of Oropharynx using Cesium 131 (Cs-131)

Short Description

LDR Brachytherapy of Oropharynx using Cesium 131

Parent Code

D91

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	1	Brachytherapy
4	TreatmentSite	F	Oropharynx
5	ModalityQualifier	B	Low Dose Rate (LDR)
6	Isotope	6	Cesium 131 (Cs-131)
7	Qualifier	Z	None

In the ICD-10-PCS Alphabetic Index

These FY 2027 ICD-10-PCS Alphabetic Index entries lead to this code:

Brachytherapy, Oropharynx

Leads to this code's table

To code brachytherapy of the oropharynx, open the FY 2027 ICD-10-PCS Alphabetic Index at Brachytherapy, then the subterm Oropharynx. The index leads to table D91, where the modality qualifier, isotope and qualifier values shown in the breakdown above complete the seven-character code D91FB6Z.

Browse the full ICD-10-PCS Alphabetic Index →

Clinical Classification (CCSR)

AHRQ groups this procedure code into these clinical categories.

RAD002

Brachytherapy

Clinical domain: Radiation Therapy

Code History

Replaces previously assigned code(s):

D91FBYZ — LDR Brachytherapy of Oropharynx using Oth Isotope

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Questions About D91FB6Z

Is D91FB6Z a billable code?

Yes. This is a complete seven-character ICD-10-PCS code, specific enough to report Low Dose Rate (LDR) Brachytherapy of Oropharynx using Cesium 131 (Cs-131) on inpatient claims from October 1, 2026 through September 30, 2027.

What do the characters in D91FB6Z 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 1 is the Modality (Brachytherapy); the 4th character F is the TreatmentSite (Oropharynx); the 5th character B is the ModalityQualifier (Low Dose Rate (LDR)); the 6th character 6 is the Isotope (Cesium 131 (Cs-131)); the 7th character Z is the Qualifier (None).