ICD-10-PCS 2027 procedure code
BB4CZZZUltrasonography of Mediastinum
Code unchanged since ICD-10-PCS took effect on October 1, 2015. Source: official FY2027 ICD-10-PCS release from CMS. Page updated September 29, 2026. About our data
About BB4CZZZ
BB4CZZZ is the ICD-10-PCS code for a ultrasonography procedure on the mediastinum using a none approach with none (qualifier: none). In ICD-10-PCS, ultrasonography means real time display of images of anatomy or flow information developed from the capture of reflected and attenuated high frequency sound waves.
In plain terms, this corresponds to diagnostic ultrasound of other sites of thorax, the ICD-9-CM procedure title it maps to (88.73).
For a different body part, codes include BB4BZZZ (pleura).
It doesn't appear in the MS-DRG procedure index, so on its own it doesn't change the DRG assignment.
It has been valid since ICD-10-PCS took effect on October 1, 2015.
What each character means
- 1. Section
- BImaging
- 2. Body System
- BRespiratory System
- 3. Type
- 4Ultrasonography
Real time display of images of anatomy or flow information developed from the capture of reflected and attenuated high frequency sound waves
- 4. Body Part
- CMediastinum
- 5. Contrast
- ZNone
- 6. Qualifier
- ZNone
- 7. Qualifier
- ZNone
Other versions of this procedure
Different body part
ICD-9-CM equivalent
Converter →- 88.73Diagnostic ultrasound of other sites of thoraxapproximate
From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
- No changes since FY2016.
Common questions about BB4CZZZ
Is BB4CZZZ a valid ICD-10-PCS code for 2027?
- Yes. BB4CZZZ is valid for inpatient procedures from October 1, 2026 through September 30, 2027.
What is the ICD-9 procedure code for BB4CZZZ?
- The CMS GEMs map BB4CZZZ to ICD-9-CM 88.73 (Diagnostic ultrasound of other sites of thorax).