M45.7
Ankylosing spondylitis of lumbosacral 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 10 same parent — 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 M45.8 Ankylosing spondylitis sacral and sacrococcygeal region M45.9 Ankylosing spondylitis of unspecified sites in spine M45.A Non-radiographic axial spondyloarthritis category
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.