M45.A4
Non-radiographic axial spondyloarthritis of thoracic region
Billable FY2026 2025-10-01 → 2026-09-30
Exclusions 13 never code together
M45code
M00-M99chapter
Excludes2
- arthropathic psoriasis (L40.5-)L40.5-
- certain conditions originating in the perinatal period (P04-P96)P04-P96
- certain infectious and parasitic diseases (A00-B99)A00-B99
- compartment syndrome (traumatic) (T79.A-)T79.A-
- complications of pregnancy, childbirth and the puerperium (O00-O9A)O00-O9A
- congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)Q00-Q99
- endocrine, nutritional and metabolic diseases (E00-E88)E00-E88
- injury, poisoning and certain other consequences of external causes (S00-T88)S00-T88
- neoplasms (C00-D49)C00-D49
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)R00-R94
Excludes1 — never code together. The excluded condition and this one are mutually exclusive.
Excludes2 — not included here, but the patient may have both. Code both when documented.
Instructional notes 2
Index entries leading here 1
Alongside this code 9 same parent — M45.A
M45.A0 Non-radiographic axial spondyloarthritis unsp site in spin M45.A1 Non-radiographic axial spondyloarthritis occipt-atlan-ax rgn M45.A2 Non-radiographic axial spondyloarthritis of cervical region M45.A3 Non-radiographic axial spondyloarthritis of cervicothor rgn M45.A5 Non-radiographic axial spondyloarthritis of thrclm region M45.A6 Non-radiographic axial spondyloarthritis of lumbar region M45.A7 Non-radiographic axial spondyloarthritis of lumbosacr region M45.A8 Non-radiographic axial spondyloarthritis sacr/sacrocygl rgn M45.AB Non-radiographic axial spondyloarthritis mult site in spine
Medications 1
MED-RT files conditions by MeSH, which carves the world differently from ICD-10. These are name matches on this code's description, offered as candidates — not as an assertion that they are this code.
Additional references
AHA Coding Clinic® Licence required
Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.