M46.05

HCC Category Mapping

What This Code Means

Inflammation of the tendons and ligaments where they attach to the bones at the junction between the mid-back and lower back (thoracolumbar region).

Coding Tips

• •The thoracolumbar region spans the transition between T12 and L1 vertebrae; confirm documentation specifies this junction area
• •This location is common in patients with ankylosing spondylitis or other spondyloarthropathies

Clinical Significance

Thoracolumbar spinal enthesopathy occurs at the junction between the rigid thoracic cage and mobile lumbar spine, creating unique biomechanical stress patterns. This location often correlates with occupational lifting activities and requires comprehensive functional assessment.

Documentation Requirements

• ✓Clinical evidence of thoracolumbar junction entheseal inflammation
• ✓Imaging findings at the thoracolumbar transition
• ✓Documentation of junction-specific pain patterns
• ✓Assessment of spinal mobility across the transition zone
• ✓Evaluation for occupational and biomechanical factors
• ✓Response to targeted anti-inflammatory therapy
• ✓Functional capacity evaluation when appropriate
• ✓Associated inflammatory arthritis screening

Commonly Confused Codes