B90HZZZPlain Radiography of Mastoids
- Billable / Specific Code
B90HZZZ is a billable ICD-10-PCS procedure code for Plain Radiography of Mastoids. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). The root operation Plain Radiography involves planar display of an image developed from the capture of external ionizing radiation on photographic or photoconductive plate. In AHRQ's Clinical Classifications Software (CCSR), this procedure falls under Plain radiography.
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 | B | Imaging |
| 2 | Body System | 9 | Ear, Nose, Mouth and Throat |
| 3 | Type | 0 | Plain Radiography |
| 4 | BodyPart | H | Mastoids |
| 5 | Contrast | Z | None |
| 6 | Qualifier | Z | None |
| 7 | Qualifier | Z | None |
In the ICD-10-PCS Alphabetic Index
These FY 2026 ICD-10-PCS Alphabetic Index entries lead to this code:
To code plain radiography of the mastoid, open the FY 2026 ICD-10-PCS Alphabetic Index at Plain Radiography, then the subterm Mastoid. The entry lists B90HZZZ directly as a complete, billable code.
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.
Questions About B90HZZZ
Is B90HZZZ a billable code?
Yes. This is a complete seven-character ICD-10-PCS code, specific enough to report Plain Radiography of Mastoids on inpatient claims from October 1, 2025 through September 30, 2026.
What is the ICD-10-PCS code for plain radiography of the mastoid?
The FY 2026 ICD-10-PCS Alphabetic Index entry Plain Radiography, Mastoid is a direct entry for B90HZZZ, Plain Radiography of Mastoids, billable on inpatient claims from October 1, 2025 through September 30, 2026.
What do the characters in B90HZZZ mean?
The code breaks down character by character: the 1st character B is the Section (Imaging); the 2nd character 9 is the Body System (Ear, Nose, Mouth and Throat); the 3rd character 0 is the Type (Plain Radiography); the 4th character H is the BodyPart (Mastoids); the 5th character Z is the Contrast (None); the 6th character Z is the Qualifier (None); the 7th character Z is the Qualifier (None).
What is the ICD-9-PCS equivalent of B90HZZZ?
Under the General Equivalence Mappings, Plain Radiography of Mastoids crosswalks to ICD-9-PCS 87.16 (Other x-ray of facial bones). The mapping is approximate, so confirm it fits the documentation.
