Non-radiographic axial spondyloarthritis
Non-radiographic axial spondyloarthritis
M45.A is a header (parent) code in the ICD-10-CM hierarchy. It is not billable for claim submission. Use one of the billable child codes listed below.
Billable codes in this category
Each of the codes below is billable. Choose the one that most accurately describes the patient's diagnosis.
Non-radiographic axial spondyloarthritis (nr-axSpA) affecting the spine at an unspecified vertebral region — inflammatory sacroiliitis confirmed on MRI without corresponding plain-film radiographic changes.
Non-radiographic axial spondyloarthritis localized to the occipito-atlanto-axial region — the articulations between the occiput, atlas (C1), and axis (C2) — where active inflammation is confirmed by MRI or clinical criteria but plain radiographs show no definitive structural damage.
M45.A2 identifies non-radiographic axial spondyloarthritis (nr-axSpA) localized to the cervical spine — an inflammatory spondyloarthropathy meeting clinical and MRI criteria for axSpA but lacking the structural sacroiliac changes visible on plain radiographs required for an ankylosing spondylitis diagnosis.
Inflammatory axial spondyloarthritis localized to the cervicothoracic spinal region (C7–T1 junction) in which structural damage — sacroiliitis or syndesmophytes — is absent on plain radiographs but may be detectable on MRI.
Axial spondyloarthritis affecting the thoracic spine in which inflammatory disease activity is confirmed clinically and by MRI or laboratory markers but spinal or sacroiliac joint changes are absent on plain radiographs.
Non-radiographic axial spondyloarthritis localized to the thoracolumbar junction (T12–L1 region), confirmed by clinical criteria and MRI findings rather than plain radiographic sacroiliitis.
Axial spondyloarthritis of the lumbar spine with active inflammation confirmed by MRI or clinical criteria but without the structural sacroiliac joint damage visible on plain radiographs that defines ankylosing spondylitis.
Non-radiographic axial spondyloarthritis confined to the lumbosacral region — inflammatory spondyloarthritis with active sacroiliitis on MRI or positive HLA-B27 but no definitive structural damage visible on plain radiograph.
Non-radiographic axial spondyloarthritis localized to the sacral and sacrococcygeal region, where inflammatory sacroiliitis is confirmed by MRI or clinical/lab criteria but structural damage is absent on plain radiographs.
Non-radiographic axial spondyloarthritis (nr-axSpA) involving two or more distinct spinal regions simultaneously, where active spinal inflammation is confirmed but without the structural sacroiliac joint damage visible on plain radiographs.