M45.ANon-radiographic axial spondyloarthritis

M45.A is the ICD-10-CM diagnosis code for Non-radiographic axial spondyloarthritis. It belongs to category M45 (ankylosing spondylitis), block M45-M49 (spondylopathies) and chapter 13 (diseases of the musculoskeletal system and connective tissue). It is a header code, so it can't be reported by itself; one of its 10 subcodes must be used instead.

Within M45 (ankylosing spondylitis), M45.A is specifically for Non-radiographic axial spondyloarthritis. Related codes cover of multiple sites in spine (M45.0), of occipito-atlanto-axial region (M45.1), of cervical region (M45.2), of cervicothoracic region (M45.3), of thoracic region (M45.4), of thoracolumbar region (M45.5), lumbar region (M45.6), of lumbosacral region (M45.7) and 2 more.

To report this condition, pick the subcode that matches the documentation: M45.A0 (of unspecified sites in spine), M45.A1 (of occipito-atlanto-axial region), M45.A2 (of cervical region), M45.A3 (of cervicothoracic region), M45.A4 (of thoracic region), M45.A5 (of thoracolumbar region), M45.A6 (of lumbar region), M45.A7 (of lumbosacral region) and 2 more.

It was added in FY2022, effective October 1, 2021.