M45 is a non-billable/non-specific diagnosis code from the 2026 ICD-10-CM used to classify the following condition: Ankylosing spondylitis.
Inclusion term
Rheumatoid arthritis of spine
Type 1 excludes
Type 2 excludes
Behçet's disease (M35.2)
Codes
M45.0
Ankylosing spondylitis of multiple sites in spine
M45.1
Ankylosing spondylitis of occipito-atlanto-axial region
M45.2
Ankylosing spondylitis of cervical region
M45.3
Ankylosing spondylitis of cervicothoracic region
M45.4
Ankylosing spondylitis of thoracic region
M45.5
Ankylosing spondylitis of thoracolumbar region
M45.6
Ankylosing spondylitis lumbar region
M45.7
Ankylosing spondylitis of lumbosacral region
M45.8
Ankylosing spondylitis sacral and sacrococcygeal region
M45.9
Ankylosing spondylitis of unspecified sites in spine
M45.A
Non-radiographic axial spondyloarthritis
Versions
2026
Code changed
Type 2 excludes
Behu00e7et's disease (M35.2)
- Behçet's disease (M35.2)
2025
Code changed
Type 2 excludes
Behçet's disease (M35.2)
- Behu00e7et's disease (M35.2)
2024
No changes
2023
No changes
2022
No changes
2021
No changes
2020
No changes
2019
No changes
2018
No changes
2017
No changes
2016
New code