BL4 Ultrasonography - Connective Tissue ICD-10-PCS
The BL4 code range contains 5 ICD-10-PCS codes for Ultrasonography procedures on the connective tissue. 4 of the codes are billable and valid for inpatient claim submission in fiscal year 2026.
Root Operation Definition
Ultrasonography: Real time display of images of anatomy or flow information developed from the capture of reflected and attenuated high frequency sound waves.
Codes in the BL4 Range 5 codes · 4 billable
About the BL4 Code Range
The ICD-10-PCS root operation Ultrasonography (code BL4) refers to an imaging procedure that uses ultrasound waves to visualize internal structures, specifically connective tissues in this classification. This operation captures detailed images without the need for invasive methods.
Within the Imaging section, Ultrasonography is applied to various body parts such as connective tissue and tendons of the extremities. For example, the code BL40ZZZ represents ultrasonography of the upper extremity connective tissue, while BL41ZZZ is the equivalent for the lower extremity connective tissue. Additionally, ultrasonography of upper extremity tendons corresponds to BL42ZZZ, and BL43ZZZ denotes the procedure on lower extremity tendons. These codes document the use of ultrasound imaging to assess musculoskeletal components with precision, aiding in diagnosis and treatment planning without causing tissue disruption.
Questions About This Page
How many billable codes are in the BL4 range?
Of the 5 codes in this range, 4 are billable and valid for inpatient claim submission from October 1, 2025 through September 30, 2026. Table header codes group them but cannot be reported on claims.
What does the BL4 range classify?
The range classifies Ultrasonography procedures, real time display of images of anatomy or flow information developed from the capture of reflected and attenuated high frequency sound waves, performed on the connective tissue. Each code adds the body part, approach, device, and qualifier in characters four through seven, and links to its own reference page.
Related References
Source: CMS FY 2026 ICD-10-PCS order file and code tables, effective October 1, 2025 through September 30, 2026.
