M51.A2
BillableIntervertebral annulus fibrosus defect, large, lumbar region
This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).
What This Code Means
A large tear or defect in the outer fibrous ring of a spinal disc in the lower back.
Coding Tips
- •Confirm documentation explicitly states 'large' size to justify this code over unspecified or small variants
- •Large defects may be associated with disc herniation or extrusion; review for additional codes if applicable
Code Hierarchy
└M51Thoracic, thoracolumbar, and lumbosacral intervertebral disc disorders└M51.AOther lumbar and lumbosacral annulus fibrosus disc defects└M51.A2Intervertebral annulus fibrosus defect, large, lumbar region
└M51.A2Intervertebral annulus fibrosus defect, large, lumbar region