International Classification of Diseases (ICD-10) diagnostic codes for the spondyloarthritis family of disorders selected for this study
| Subtype | ICD-10 code | Diagnosis |
|---|---|---|
| AS | M45 | AS |
| PsA | L40.5 | PsA with joint disease |
| M07.0 | Distal interphalangeal psoriatic arthropathy | |
| M07.1 | Arthritis mutilans | |
| M07.2 | Psoriatic spondylitis | |
| M07.3 | Other psoriatic arthropathies | |
| Aa-IBD | M07.4 | Arthropathy in Crohn's disease |
| M07.5 | Arthropathy in ulcerative colitis | |
| USpA | M46.0 | Spinal enthesopathy |
| M46.1 | Sacroilitis, not elsewhere classified | |
| M46.8 | Other specified inflammatory spondylopathies | |
| M46.9 | Inflammatory spondylopathy, unspecified |
Aa-IBD, inflammatory arthritis associated with inflammatory bowel disease; AS, ankylosing spondylitis; PsA, psoriatric arthritis; USpA, undifferentiated spondylarthritis.