Thoracic, thoracolumbar, and lumbosacral intervertebral disc disorders (M51) ICD-10-CM
The M51 code range covers thoracic, thoracolumbar, and lumbosacral intervertebral disc disorders with 46 ICD-10-CM diagnosis codes. 36 of them are billable and valid for claim submission in fiscal year 2027, and the category headers group them but cannot themselves be billed.
Type 2 Excludes
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
Codes in the M51 Range 46 codes · 36 billable
- M51 Thoracic, thoracolumbar, and lumbosacral intervertebral disc disordersNon-billable
- M51.0 Thoracic, thoracolumbar and lumbosacral intervertebral disc disorders with myelopathyNon-billable
- M51.04 Intervertebral disc disorders with myelopathy, thoracic region
- M51.05 Intervertebral disc disorders with myelopathy, thoracolumbar region
- M51.06 Intervertebral disc disorders with myelopathy, lumbar region
- M51.1 Thoracic, thoracolumbar and lumbosacral intervertebral disc disorders with radiculopathyNon-billable
- M51.14 Intervertebral disc disorders with radiculopathy, thoracic region
- M51.15 Intervertebral disc disorders with radiculopathy, thoracolumbar region
- M51.16 Intervertebral disc disorders with radiculopathy, lumbar region
- M51.17 Intervertebral disc disorders with radiculopathy, lumbosacral region
- M51.2 Other thoracic, thoracolumbar and lumbosacral intervertebral disc displacementNon-billable
- M51.24 Other intervertebral disc displacement, thoracic region
- M51.25 Other intervertebral disc displacement, thoracolumbar region
- M51.26 Other intervertebral disc displacement, lumbar region
- M51.27 Other intervertebral disc displacement, lumbosacral region
- M51.3 Other thoracic, thoracolumbar and lumbosacral intervertebral disc degenerationNon-billable
- M51.34 Other intervertebral disc degeneration, thoracic region
- M51.35 Other intervertebral disc degeneration, thoracolumbar region
- M51.36 Other intervertebral disc degeneration, lumbar regionNon-billable
- M51.360 Other intervertebral disc degeneration, lumbar region with discogenic back pain only
- M51.361 Other intervertebral disc degeneration, lumbar region with lower extremity pain only
- M51.362 Other intervertebral disc degeneration, lumbar region with discogenic back pain and lower extremity pain
- M51.369 Other intervertebral disc degeneration, lumbar region without mention of lumbar back pain or lower extremity pain
- M51.37 Other intervertebral disc degeneration, lumbosacral regionNon-billable
- M51.370 Other intervertebral disc degeneration, lumbosacral region with discogenic back pain only
- M51.371 Other intervertebral disc degeneration, lumbosacral region with lower extremity pain only
- M51.372 Other intervertebral disc degeneration, lumbosacral region with discogenic back pain and lower extremity pain
- M51.379 Other intervertebral disc degeneration, lumbosacral region without mention of lumbar back pain or lower extremity pain
- M51.4 Schmorl's nodesNon-billable
- M51.44 Schmorl's nodes, thoracic region
- M51.45 Schmorl's nodes, thoracolumbar region
- M51.46 Schmorl's nodes, lumbar region
- M51.47 Schmorl's nodes, lumbosacral region
- M51.8 Other thoracic, thoracolumbar and lumbosacral intervertebral disc disordersNon-billable
- M51.84 Other intervertebral disc disorders, thoracic region
- M51.85 Other intervertebral disc disorders, thoracolumbar region
- M51.86 Other intervertebral disc disorders, lumbar region
- M51.87 Other intervertebral disc disorders, lumbosacral region
- M51.9 Unspecified thoracic, thoracolumbar and lumbosacral intervertebral disc disorder
- M51.A Other lumbar and lumbosacral annulus fibrosus disc defectsNon-billable
- M51.A0 Intervertebral annulus fibrosus defect, lumbar region, unspecified size
- M51.A1 Intervertebral annulus fibrosus defect, small, lumbar region
- M51.A2 Intervertebral annulus fibrosus defect, large, lumbar region
- M51.A3 Intervertebral annulus fibrosus defect, lumbosacral region, unspecified size
- M51.A4 Intervertebral annulus fibrosus defect, small, lumbosacral region
- M51.A5 Intervertebral annulus fibrosus defect, large, lumbosacral region
About the M51 Code Range
These disorders affect spinal discs in the thoracic, thoracolumbar, lumbar, and lumbosacral regions.
The main branches separate disorders with myelopathy or radiculopathy (M51.0 and M51.1), displaced discs (M51.2), and disc degeneration (M51.3). Separate branches identify Schmorl's nodes, other or unspecified disc disorders, and defects in the disc's annulus fibrosus.
Most branches then divide by spinal region. Lumbar and lumbosacral degeneration subdivides by whether back pain, lower-extremity pain, both, or neither are mentioned. Annulus fibrosus defects divide by region and by small, large, or unspecified size.
Questions About This Page
How many billable codes are in the M51 range?
Of the 46 codes in this range, 36 are billable and valid for claim submission from October 1, 2026 through September 30, 2027. Category header codes group them but cannot be reported on claims.
What does the M51 range classify?
The range classifies thoracic, thoracolumbar, and lumbosacral intervertebral disc disorders. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2027 ICD-10-CM Tabular List and order file, effective October 1, 2026 through September 30, 2027.
