D90B4ZZBeam Radiation of Larynx using Heavy Particles (Protons,Ions)
- Billable / Specific Code
D90B4ZZ is a billable ICD-10-PCS procedure code for Beam Radiation of Larynx using Heavy Particles (Protons,Ions). 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 Beam radiation.
Code Identity
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 | 0 | Beam Radiation |
| 4 | TreatmentSite | B | Larynx |
| 5 | ModalityQualifier | 4 | Heavy Particles (Protons,Ions) |
| 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:
To code beam radiation of the larynx, open the FY 2027 ICD-10-PCS Alphabetic Index at Beam Radiation, then the subterm Larynx. The index leads to table D90, where the modality qualifier, isotope and qualifier values shown in the breakdown above complete the seven-character code D90B4ZZ.
Clinical Classification (CCSR)
AHRQ groups this procedure code into these clinical categories.
Convert to ICD-9-PCS
Closest ICD-9-PCS equivalents for this code under the General Equivalence Mappings.
Similar Procedure Codes
Questions About D90B4ZZ
Is D90B4ZZ a billable code?
Yes. This is a complete seven-character ICD-10-PCS code, specific enough to report Beam Radiation of Larynx using Heavy Particles (Protons,Ions) on inpatient claims from October 1, 2026 through September 30, 2027.
What do the characters in D90B4ZZ 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 0 is the Modality (Beam Radiation); the 4th character B is the TreatmentSite (Larynx); the 5th character 4 is the ModalityQualifier (Heavy Particles (Protons,Ions)); the 6th character Z is the Isotope (None); the 7th character Z is the Qualifier (None).
What is the ICD-9-PCS equivalent of D90B4ZZ?
Under the General Equivalence Mappings, Beam Radiation of Larynx using Heavy Particles (Protons,Ions) crosswalks to ICD-9-PCS 92.26 (Teleradiotherapy of other particulate radiation). The mapping is approximate, so confirm it fits the documentation.
