ICD-10-PCS Body Part - B
Imaging, Axial Skeleton, Except Skull and Facial Bones, Plain Radiography, Lumbosacral Joint

The Lumbosacral Joint body part is identified by the character B in the 4^th position of the ICD-10-PCS procedure code. It is contained within the Plain Radiography root operation of the Axial Skeleton, Except Skull and Facial Bones body system under the Imaging section. The 4^the position refers to the body part or body region when applicable.