To appropriately support your spinal osteotomies reporting, you'll need to indicate underlying conditions like kyphosis or ankylosing spondylitis that necessitate the osteotomy procedures performed. Tip: "Pedicle subtraction that achieves approximately 30 degrees to 40 degrees of correction in the sagittal plane for each spinal level operated is the preferred osteotomy for patients with ankylosing spondylitis who have an imbalance of the spine in the sagittal plane," offers Jennifer Schmutz, CPC, health information coder at the Neurosurgical Associates, LLC in Salt Lake City, Utah.