| M45.A0 | Non-radiographic axial spondyloarthritis of unspecified sites in spine |
| M45.A1 | |
| M45.A2 | |
| M45.A3 | |
| M45.A4 | |
| M45.A5 | |
| M45.A6 | Non-radiographic axial spondyloarthritis of thoracolumbar region |
| M45. A7 | Non-radiographic axial spondyloarthritis of lumbosacral region |
