Ankylosing spondylitis
Non-billable header
M45 is a non-billable header code. Use one of the more specific codes below.
Inclusion terms
Includes
- Note: Use an external cause code following the code for the musculoskeletal condition, if applicable, to identify the cause of the musculoskeletal condition
Applicable to
- Rheumatoid arthritis of spine
Excludes1
Not coded here — never report together with this code.
Excludes2
Not included here — may be reported together when both conditions exist.
- arthropathic psoriasis (L40.5-)
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- compartment syndrome (traumatic) (T79.A-)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
- Behçet's disease (M35.2)
Also known as
- Rheumatoid arthritis of spine
More specific codes M45
- M45.0Ankylosing spondylitis of multiple sites in spineBillable
- M45.1Ankylosing spondylitis of occipito-atlanto-axial regionBillable
- M45.2Ankylosing spondylitis of cervical regionBillable
- M45.3Ankylosing spondylitis of cervicothoracic regionBillable
- M45.4Ankylosing spondylitis of thoracic regionBillable
- M45.5Ankylosing spondylitis of thoracolumbar regionBillable
- M45.6Ankylosing spondylitis lumbar regionBillable
- M45.7Ankylosing spondylitis of lumbosacral regionBillable
- M45.8Ankylosing spondylitis sacral and sacrococcygeal regionBillable
- M45.9Ankylosing spondylitis of unspecified sites in spineBillable
- M45.ANon-radiographic axial spondyloarthritisHeader