M45 Ankylosing spondylitis

Non-billable header with 11 child codes.

Applicable to

• Rheumatoid arthritis of spine

Excludes1 (never code together)

• arthropathy in Reiter's disease (M02.3-)
• juvenile (ankylosing) spondylitis (M08.1)

Excludes2 (not included here)

• Behçet's disease (M35.2)

Applies from M45 Ankylosing spondylitis

Applicable to

• Rheumatoid arthritis of spine

Excludes1 (never code together)

• arthropathy in Reiter's disease (M02.3-)
• juvenile (ankylosing) spondylitis (M08.1)

Excludes2 (not included here)

• Behçet's disease (M35.2)

Codes under M45

• 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

Code annotations containing back-references to M45

Back-references to M45

• Type 1 Excludes: G55 Nerve root and plexus compressions in diseases classified elsewhere ("nerve root compression (due to) (in) ankylosing spondylitis (M45.-)")
• Code First: J99 Respiratory disorders in diseases classified elsewhere ("ankylosing spondylitis (M45.-)")
• Type 1 Excludes: M05 Rheumatoid arthritis with rheumatoid factor ("rheumatoid arthritis of spine (M45.-)")

Back-references to M45

• Type 1 Excludes: G55 Nerve root and plexus compressions in diseases classified elsewhere ("nerve root compression (due to) (in) ankylosing spondylitis (M45.-)")
• Code First: J99 Respiratory disorders in diseases classified elsewhere ("ankylosing spondylitis (M45.-)")
• Type 1 Excludes: M05 Rheumatoid arthritis with rheumatoid factor ("rheumatoid arthritis of spine (M45.-)")

Nearby codes

• M45 Ankylosing spondylitis (this code)
• 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