Alphabetic Index FY2027

M45.A

Non-radiographic axial spondyloarthritis

FY2027Chapter 13: Diseases of the musculoskeletal system and connective tissue/M45–M49 Spondylopathies

Non-billable headerNot valid on its own. Use one of the more specific codes under it.

M45.A is a non-billable ICD-10-CM code header for non-radiographic axial spondyloarthritis. Report a more specific code from it instead. It is part of the FY2027 code set, effective October 1, 2026. The more specific codes under it are M45.A0 Non-radiographic axial spondyloarthritis of unspecified sites in spine, M45.A1 Non-radiographic axial spondyloarthritis of occipito-atlanto-axial region, M45.A2 Non-radiographic axial spondyloarthritis of cervical region, M45.A3 Non-radiographic axial spondyloarthritis of cervicothoracic region and 6 more. Its coding notes include 2 Excludes1 entries and 11 Excludes2 entries.

Excludes1

Not coded here. The listed conditions generally should not be reported together.

Inherited from M45 Ankylosing spondylitis
  • arthropathy in Reiter's disease (M02.3-)
  • juvenile (ankylosing) spondylitis (M08.1)

Excludes2

Not included here. Both codes may be reported if the patient has both conditions.

Inherited from M45 Ankylosing spondylitis
  • Behçet's disease (M35.2)
Also from chapter/block level (10 notes)
Inherited from Chapter 13 Diseases of the musculoskeletal system and connective tissue
  • 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)

Notes

Also from chapter/block level (1 note)
Inherited from Chapter 13 Diseases of the musculoskeletal system and connective tissue
  • Use an external cause code following the code for the musculoskeletal condition, if applicable, to identify the cause of the musculoskeletal condition

More specific codes under M45.A 10