M51 Thoracic, thoracolumbar, and lumbosacral intervertebral disc disorders

Category / Non-billable header 45 subcodes

Block: Other dorsopathies (M50-M54)

Excludes 2 (not included here)

  • cervical and cervicothoracic disc disorders (M50.-)
  • sacral and sacrococcygeal disorders (M53.3)

Subcodes

Subcodes are listed below for reference. Detail pages are not available for chapters 11–22.

Code Description Billable
M51..0 Thoracic, thoracolumbar and lumbosacral intervertebral disc disorders with myelopathy No
M51..04 Intervertebral disc disorders with myelopathy, thoracic region Yes
M51..05 Intervertebral disc disorders with myelopathy, thoracolumbar region Yes
M51..06 Intervertebral disc disorders with myelopathy, lumbar region Yes
M51..1 Thoracic, thoracolumbar and lumbosacral intervertebral disc disorders with radiculopathy No
M51..14 Intervertebral disc disorders with radiculopathy, thoracic region Yes
M51..15 Intervertebral disc disorders with radiculopathy, thoracolumbar region Yes
M51..16 Intervertebral disc disorders with radiculopathy, lumbar region Yes
M51..17 Intervertebral disc disorders with radiculopathy, lumbosacral region Yes
M51..2 Other thoracic, thoracolumbar and lumbosacral intervertebral disc displacement No
M51..24 Other intervertebral disc displacement, thoracic region Yes
M51..25 Other intervertebral disc displacement, thoracolumbar region Yes
M51..26 Other intervertebral disc displacement, lumbar region Yes
M51..27 Other intervertebral disc displacement, lumbosacral region Yes
M51..3 Other thoracic, thoracolumbar and lumbosacral intervertebral disc degeneration No
M51..34 Other intervertebral disc degeneration, thoracic region Yes
M51..35 Other intervertebral disc degeneration, thoracolumbar region Yes
M51..36 Other intervertebral disc degeneration, lumbar region No
M51..360 Other intervertebral disc degeneration, lumbar region with discogenic back pain only Yes
M51..361 Other intervertebral disc degeneration, lumbar region with lower extremity pain only Yes
M51..362 Other intervertebral disc degeneration, lumbar region with discogenic back pain and lower extremity pain Yes
M51..369 Other intervertebral disc degeneration, lumbar region without mention of lumbar back pain or lower extremity pain Yes
M51..37 Other intervertebral disc degeneration, lumbosacral region No
M51..370 Other intervertebral disc degeneration, lumbosacral region with discogenic back pain only Yes
M51..371 Other intervertebral disc degeneration, lumbosacral region with lower extremity pain only Yes
M51..372 Other intervertebral disc degeneration, lumbosacral region with discogenic back pain and lower extremity pain Yes
M51..379 Other intervertebral disc degeneration, lumbosacral region without mention of lumbar back pain or lower extremity pain Yes
M51..4 Schmorl's nodes No
M51..44 Schmorl's nodes, thoracic region Yes
M51..45 Schmorl's nodes, thoracolumbar region Yes
M51..46 Schmorl's nodes, lumbar region Yes
M51..47 Schmorl's nodes, lumbosacral region Yes
M51..8 Other thoracic, thoracolumbar and lumbosacral intervertebral disc disorders No
M51..84 Other intervertebral disc disorders, thoracic region Yes
M51..85 Other intervertebral disc disorders, thoracolumbar region Yes
M51..86 Other intervertebral disc disorders, lumbar region Yes
M51..87 Other intervertebral disc disorders, lumbosacral region Yes
M51..9 Unspecified thoracic, thoracolumbar and lumbosacral intervertebral disc disorder Yes
M51..A Other lumbar and lumbosacral annulus fibrosus disc defects No
M51..A0 Intervertebral annulus fibrosus defect, lumbar region, unspecified size Yes
M51..A1 Intervertebral annulus fibrosus defect, small, lumbar region Yes
M51..A2 Intervertebral annulus fibrosus defect, large, lumbar region Yes
M51..A3 Intervertebral annulus fibrosus defect, lumbosacral region, unspecified size Yes
M51..A4 Intervertebral annulus fibrosus defect, small, lumbosacral region Yes
M51..A5 Intervertebral annulus fibrosus defect, large, lumbosacral region Yes

Last reviewed: September 2026