ICD-10-CM code · FY2027
M45.AB Non-radiographic axial spondyloarthritis of multiple sites in spine
BillableValid for claims as a specific diagnosis code
About M45.AB
Ask EvidencePulse about ankylosing spondylitis
Answers from the published evidence, with every study linked. The question goes into the box; nothing is sent until you press Ask.
Coding notes for M45.AB
No notes of its own; the notes below apply from the codes above it.
Also applies, from M45 Ankylosing spondylitis
Excludes1 Not coded here: never report these together with this code (use the code given instead).
Excludes2 Not part of this condition, but a patient can have both: report both codes when both apply.
- Behçet's disease (M35.2)
Chapter 13 notes (apply to every code in it)
Note
- Use an external cause code following the code for the musculoskeletal condition, if applicable, to identify the cause of the musculoskeletal condition
Excludes2 Not part of this condition, but a patient can have both: report both codes when both apply.
- 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)
Related codes in M45.A
- M45.A0 Non-radiographic axial spondyloarthritis of unspecified sites in spineBillable
- M45.A1 Non-radiographic axial spondyloarthritis of occipito-atlanto-axial regionBillable
- M45.A2 Non-radiographic axial spondyloarthritis of cervical regionBillable
- M45.A3 Non-radiographic axial spondyloarthritis of cervicothoracic regionBillable
- M45.A4 Non-radiographic axial spondyloarthritis of thoracic regionBillable
- M45.A5 Non-radiographic axial spondyloarthritis of thoracolumbar regionBillable
- M45.A6 Non-radiographic axial spondyloarthritis of lumbar regionBillable
- M45.A7 Non-radiographic axial spondyloarthritis of lumbosacral regionBillable
- M45.A8 Non-radiographic axial spondyloarthritis of sacral and sacrococcygeal regionBillable
Latest research on ankylosing spondylitis
- Increased gut inflammation is associated with greater structural spinal damage in axial spondyloarthritis
- 2 Minute Medicine Rewind Oct 27, 2025
- AbbVie: Rinvoq, a monoclonal antibody against JAK enzyme, has superior efficacy in patients with atopic dermatitis compared to Dupixent
- Spiritual well-being may be associated with improvements in pain intensity and catastrophizing in patients with chronic pain
- Wellness Check: Spirituality
2MM+
Read the research behind every diagnosis
2MM+ gives you every study summary in full, Classics downloads of the landmark trials, EvidencePulse and HypeCheck, and ad-free reading.
See 2MM+ plans