Non-radiographic axial spondyloarthritis sacr/sacrocygl rgn

This code identifies a chronic inflammatory arthritis primarily affecting the axial skeleton, specifically in the sacral and sacrococcygeal regions, without definitive radiographic evidence of sacroiliitis. Patients experience persistent back pain, stiffness, and fatigue, often worse with rest and improving with activity. It is a form of spondyloarthritis where inflammation is detectable through advanced imaging (e.g., MRI) but not yet visible on conventional X-rays.

Apply this code for patients diagnosed with non-radiographic axial spondyloarthritis (nr-axSpA) whose symptoms and inflammatory changes are localized to the sacral and sacrococcygeal areas. Documentation should clearly state the diagnosis of nr-axSpA, specify the affected region, and confirm the absence of definitive radiographic sacroiliitis, often supported by MRI findings.

• Ensure documentation explicitly states "non-radiographic" to differentiate from ankylosing spondylitis (AS) with radiographic changes.
• Do not use this code if radiographic evidence of sacroiliitis is present; instead, consider codes for ankylosing spondylitis.
• Verify the specific anatomical region (sacral and sacrococcygeal) is documented, as other axial regions have different codes.