Respiratory System (BB) ICD-10-PCS
The BB body system covers Imaging procedures on respiratory system, with 118 ICD-10-PCS codes across 5 root operations, 108 of them billable in fiscal year 2026. Each root operation defines a distinct procedural objective, and the info icons show the official definition with a preview of the codes inside.
Root Operations in This Body System 5 operations · 118 codes
| Chars 1–3 | Root Operation | Codes | Billable |
|---|---|---|---|
| BB0 | Plain RadiographyPlanar display of an image developed from the capture of external ionizing radiation on photographic or photoconductive plate | 10 | 8 |
| BB1 | FluoroscopySingle plane or bi-plane real time display of an image developed from the capture of external ionizing radiation on fluorescent screen. The image may also be stored by either digital or analog means | 20 | 18 |
| BB2 | Computerized Tomography (CT Scan)Computer-reformatted digital display of multiplanar images developed from the capture of multiple exposures of external ionizing radiation | 72 | 70 |
| BB3 | Magnetic Resonance Imaging (MRI)Computer reformatted digital display of multiplanar images developed from the capture of radio frequency signals emitted by nuclei in a body site excited within a magnetic field | 10 | 8 |
| BB4 | UltrasonographyReal time display of images of anatomy or flow information developed from the capture of reflected and attenuated high frequency sound waves | 6 | 4 |
The info icon shows the official root operation definition and previews the codes in that range.
About the BB Body System
The ICD-10-PCS root operation for the Respiratory System Imaging includes various diagnostic techniques used to create detailed images of lung and airway structures. These procedures help in evaluating respiratory conditions without invasive measures.
This operation encompasses multiple imaging modalities such as Plain Radiography (BB0), which captures planar X-ray images through external ionizing radiation on photographic plates. Real-time visualization is possible with Fluoroscopy (BB1), offering single or bi-plane moving images via fluorescent screens. More advanced techniques include Computerized Tomography (CT Scan) (BB2), which digitally reconstructs cross-sectional images from multiple X-ray exposures, and Magnetic Resonance Imaging (MRI) (BB3), which uses radio frequency signals within a magnetic field for multiplanar images. Lastly, Ultrasonography (BB4) uses reflected sound waves to produce real-time images of anatomy and flow. Each of these respiratory system imaging codes supports precise visualization critical for diagnosis and treatment planning.
Questions About This Page
How many codes are in the BB body system?
The BB body system contains 118 ICD-10-PCS codes in FY 2026, organized into 5 root operations. 108 of them are billable on inpatient claims.
What is a root operation?
The root operation is the third character of every ICD-10-PCS code and names the objective of the procedure. Drainage takes fluid out, Excision cuts out a portion of a body part, and Resection removes all of one. Picking the right root operation is the central skill of PCS coding, so each one above carries its official CMS definition.
Related References
Source: CMS FY 2026 ICD-10-PCS order file and code tables, effective October 1, 2025 through September 30, 2026.
