Respiratory System (CB) ICD-10-PCS
The CB body system covers Nuclear Medicine procedures on respiratory system, with 32 ICD-10-PCS codes across 3 root operations, 26 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 3 operations · 32 codes
| Chars 1–3 | Root Operation | Codes | Billable |
|---|---|---|---|
| CB1 | Planar Nuclear Medicine ImagingIntroduction of radioactive materials into the body for single plane display of images developed from the capture of radioactive emissions | 14 | 12 |
| CB2 | Tomographic (Tomo) Nuclear Medicine ImagingIntroduction of radioactive materials into the body for three dimensional display of images developed from the capture of radioactive emissions | 10 | 8 |
| CB3 | Positron Emission Tomographic (PET) ImagingIntroduction of radioactive materials into the body for three dimensional display of images developed from the simultaneous capture, 180 degrees apart, of radioactive emissions | 8 | 6 |
The info icon shows the official root operation definition and previews the codes in that range.
About the CB Body System
The ICD-10-PCS root operation Respiratory System under the Nuclear Medicine section involves diagnostic imaging techniques that use radioactive materials to visualize lung and airway structures. This operation focuses on capturing functional and anatomical information through various imaging modalities.
This coding category includes Planar Nuclear Medicine Imaging (code CB1), which creates single-plane images by detecting radioactive emissions from introduced materials. More advanced techniques include Tomographic Nuclear Medicine Imaging (code CB2), providing three-dimensional images for detailed spatial assessment of the respiratory system. Additionally, Positron Emission Tomographic (PET) Imaging (code CB3) captures simultaneous radioactive emissions from opposite directions, offering precise, three-dimensional functional imaging. These respiratory nuclear medicine codes enable accurate documentation of specialized imaging procedures essential for diagnosis and treatment planning within pulmonary care.
Questions About This Page
How many codes are in the CB body system?
The CB body system contains 32 ICD-10-PCS codes in FY 2026, organized into 3 root operations. 26 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.
