Background: Axial spondyloarthritis (axSpA) takes two forms – radiographic (also known as ankylosing spondylitis(AS)) and non-radiographic (nr-axSpA). The symptoms caused are similar with chronic back pain, but nr-axSpA damage cannot be seen on X-rays. Historically, nonradiographic axial spondyloarthritis (nr-axSpA) did not have any approved codes so clinicians had to use AS and other codes. Starting [...]