Connective Tissue (BL) ICD-10-PCS
The BL body system covers Imaging procedures on connective tissue, with 36 ICD-10-PCS codes across 2 root operations, 32 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 2 operations · 36 codes
| Chars 1–3 | Root Operation | Codes | Billable |
|---|---|---|---|
| BL3 | 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 | 26 | 24 |
| BL4 | UltrasonographyReal time display of images of anatomy or flow information developed from the capture of reflected and attenuated high frequency sound waves | 10 | 8 |
The info icon shows the official root operation definition and previews the codes in that range.
About the BL Body System
The ICD-10-PCS root operation Connective Tissue in the Imaging section involves detailed visualization of connective tissues using advanced imaging techniques. This operation focuses on non-invasive methods to capture images that help diagnose or evaluate conditions related to connective tissues.
Two common imaging modalities included under this operation are Magnetic Resonance Imaging (MRI) and Ultrasonography. MRI (code BL3) utilizes radio frequency signals within a magnetic field to produce computer-reformatted, multiplanar images of connective tissues. Ultrasonography (code BL4) uses high-frequency sound waves to generate real-time images or flow information, enabling dynamic assessment of these tissues. These connective tissue imaging codes provide precise documentation for diagnostic procedures that help clinicians assess the structure and function of connective tissues without invasive intervention.
Questions About This Page
How many codes are in the BL body system?
The BL body system contains 36 ICD-10-PCS codes in FY 2026, organized into 2 root operations. 32 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.
