Sacroiliitis, not elsewhere classified

This code represents inflammation of one or both sacroiliac joints, which connect the sacrum to the ilium. This condition typically causes pain in the lower back, buttocks, and sometimes the legs, often exacerbated by prolonged standing or weight-bearing activities. It is a form of spondyloarthropathy that can be acute or chronic.

Apply this code when documentation explicitly states a diagnosis of sacroiliitis without further specification of its underlying cause. This is appropriate for cases where the inflammation is idiopathic or the specific etiology (e.g., infectious, traumatic, autoimmune) is unknown or not documented. Supporting documentation includes physician notes detailing sacroiliac joint pain, tenderness, and imaging findings consistent with inflammation.

• Do not use this code if the sacroiliitis is clearly linked to a specific underlying condition (e.g., ankylosing spondylitis, psoriatic arthritis); instead, code the primary condition.
• Ensure the documentation specifies "not elsewhere classified" or indicates that the cause is unknown to justify using this general code.
• Consider laterality if specified (e.g., unilateral vs. bilateral) as some codes may offer more specificity, though this particular code does not.